\documentclass[11pt]{article}
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\usepackage{Sweave}
\usepackage{bm}
\usepackage{anysize}

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% \VignetteIndexEntry{Summary of Recent Updates to Spatstat}

\newcommand{\pkg}[1]{\texttt{#1}}
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\begin{document}
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<<echo=FALSE,results=hide>>=
library(spatstat)
sversion <- read.dcf(file = system.file("DESCRIPTION", package = "spatstat"),
         fields = "Version")
options(useFancyQuotes=FALSE)
@ 

\title{Summary of recent updates to \spst}
\author{Adrian Baddeley, Rolf Turner and Ege Rubak}
\date{For \spst\ version \texttt{\Sexpr{sversion}}}
\maketitle

\thispagestyle{empty}

This is a summary of changes that have been made 
to the \spst\ package since the publication of the 
accompanying book \cite{baddrubaturn15}.
The book, published in December 2015,
covers everything in \spst\ up to version \texttt{1.42-0}, 
released in May 2015.

<<echo=FALSE,results=hide>>=
z <- read.table("packagesizes.txt", header=TRUE)
z$date <- as.Date(z$date)
changes <- z[nrow(z), ] - z[z$version == "1.42-0", ]
newobj <- changes[["nobjects"]]
newdat <- changes[["ndatasets"]] + 1  # counting rule doesn't detect redwood3
@ %$

The current version of \spst\ is \texttt{\Sexpr{sversion}}.
It contains \Sexpr{newobj} new functions
and \Sexpr{newdat} new datasets
introduced after May 2015. This document summarises the most important changes.

This document also lists all \emph{important} bugs detected \emph{since 2010}.

<<echo=FALSE,results=hide,fig=FALSE>>=
options(SweaveHooks=list(fig=function() par(mar=0.2+c(2,4,2,0))))
Plot <- function(fmla, ..., dat=z) {
  yvals <- eval(as.expression(fmla[[2]]), envir=dat)
  plot(fmla, ..., data=dat, type="l", xlab="", lwd=2, ylim=c(0, max(yvals)))
}
@ 
\SweaveOpts{eps=TRUE}
\setkeys{Gin}{width=0.45\textwidth}

\centerline{
<<fig=TRUE,echo=FALSE,results=hide>>=
Plot((Rlines + srclines)/1000 ~ date, ylab="Lines of code (x 1000)", 
     main="Spatstat growth")
lines(srclines/1000 ~ date, data=z)
text(as.Date("2013-01-01"), 9.5, "C code")
text(as.Date("2013-01-01"), 50, "R code")
@ 
}

\tableofcontents

\newpage

\section{Precis of all changes}

Here is the text from the `overview' sections of 
the News and Release Notes for each update. 

\begin{itemize}
   \item \spst\ now depends on the packages \pkg{nlme} and \pkg{rpart}.

  \item Important bug fix in \code{linearK}, \code{linearpcf}

  \item Changed internal format of \code{linnet} and \code{lpp} objects.

  \item Faster computation in linear networks.

  \item Bias correction techniques.
  
  \item Bounding circle of a spatial object.

  \item Option to plot marked points as arrows.

  \item Kernel smoothing accelerated.

  \item Workaround for bug in some graphics drivers affecting image orientation.

  \item Non-Gaussian smoothing kernels.

   \item Improvements to inhomogeneous multitype $K$ and $L$ functions.

   \item Variance approximation for pair correlation function.

   \item Leverage and influence for multitype point process models.

   \item Functions for extracting components of vector-valued objects.

  \item Recursive-partition point process models.

   \item Minkowski sum, morphological dilation and erosion with any shape.

  \item Minkowski sum also applicable to point patterns and line segment patterns.
    
   \item Important bug fix in Smooth.ppp
 
   \item Important bug fix in spatial CDF tests.

   \item  More bug fixes for replicated patterns.

   \item Simulate a model fitted to replicated point patterns.

   \item Inhomogeneous multitype $F$ and $G$ functions.

   \item Summary functions recognise \texttt{correction="all"}

   \item Leverage and influence code handles bigger datasets.

   \item More support for pixel images.

   \item Improved progress reports.

   \item New dataset \texttt{redwood3}

    \item Fixed namespace problems arising when spatstat is not loaded.

   \item Important bug fix in leverage/influence diagnostics for Gibbs models.

   \item Surgery with linear networks.
   
   \item Tessellations on a linear network.

   \item Laslett's Transform.

   \item Colour maps for point patterns with continuous marks
     are easier to define.

   \item Pair correlation function estimates can be pooled.

   \item Stipulate a particular version of a package.

   \item More support for replicated point patterns.
     
   \item More support for tessellations.

  \item More support for multidimensional point patterns and point processes.

   \item More options for one-sided envelopes.

   \item More support for model comparison.

   \item Convexifying operation.

   \item Subdivide a linear network.

   \item Penttinen process can be simulated (by Metropolis-Hastings or CFTP).

   \item Calculate the predicted variance of number of points.

   \item Accelerated algorithms for linear networks.

   \item Quadrat counting accelerated, in some cases.

   \item Simulation algorithms have been accelerated; simulation outcomes 
   are \emph{not} identical to those obtained from previous versions of \spst. 

   \item Determinantal point process models.

   \item Random-effects and mixed-effects models for replicated patterns.

   \item Dao-Genton test, and corresponding simulation envelopes.

   \item Simulated annealing and simulated tempering.

   \item spatstat colour tools now handle transparent colours.

   \item Improvements to \verb![! and \texttt{subset} methods

   \item Extensions to kernel smoothing on a linear network.

   \item Support for one-dimensional smoothing kernels.

   \item Mark correlation function may include weights.

   \item Cross-correlation version of the mark correlation function.

   \item Penttinen pairwise interaction model.

   \item Improvements to simulation of Neyman-Scott processes.

   \item Improvements to fitting of Neyman-Scott models.

   \item Extended functionality for pixel images.

   \item Fitted intensity on linear network

   \item Triangulation of windows.

   \item  Corrected an edge correction.
   \end{itemize}  
   
\section{New datasets}  

The following datasets have been added to the package.

\begin{itemize}
\item \texttt{austates}: The states and large mainland territories of Australia
   represented as polygonal regions forming a tessellation.
 \item \texttt{redwood3}: a more accurate version of the \texttt{redwood} data.
\end{itemize}

\section{New Functions}

Following is a list of all the functions that have been added.

\begin{itemize}
  
    \item \texttt{anyNA.im}:
    Method for \texttt{anyNA} for pixel images.

    \item \texttt{bc}:
    Bias correction (Newton-Raphson) for fitted model parameters. 

    \item \texttt{rex}:
    Richardson extrapolation for numerical integrals and 
    statistical model parameter estimates. 

    \item \texttt{boundingcircle}, \texttt{boundingcentre}:
    Find the smallest circle enclosing a window or point pattern.

    \item \verb![.linim! : 
    Subset operator for pixel images on a linear network.

    \item \texttt{mean.linim}, \texttt{median.linim}, \texttt{quantile.linim}:
    The mean, median, or quantiles of pixel values in a 
    pixel image on a linear network.

  \item \texttt{weighted.median}, \texttt{weighted.quantile}:
    Median or quantile of numerical data with associated weights.

  \item \verb!"[.linim"!:
    Subset operator for pixel images on a linear network.

  \item \texttt{mean.linim}, \texttt{median.linim}, \texttt{quantile.linim}:
    The mean, median, or quantiles of pixel values in a 
    pixel image on a linear network.
  
  \item \texttt{boundingcircle}, \texttt{boundingcentre}:
   Smallest circle enclosing a spatial object.

 \item \texttt{split.msr}:
    Decompose a measure into parts.

  \item \texttt{unstack.msr}:
    Decompose a vector-valued measure into its component measures.

  \item \texttt{unstack.ppp}, \texttt{unstack.psp}, \texttt{unstack.lpp}:
    Given a spatial pattern with several columns of marks,
    separate the columns and return a list of spatial patterns, 
    each having only one column of marks.

 \item \texttt{kernel.squint}:
    Integral of squared kernel, for the kernels used in density estimation.

 \item \texttt{as.im.data.frame}:
  Build a pixel image from a data frame of coordinates and pixel values.

\item \texttt{covering}:
    Cover a window using discs of a given radius.

\item \texttt{dilationAny}, \texttt{erosionAny}, \verb!%(-)%! :
    Morphological dilation and erosion by any shape.

\item \texttt{FmultiInhom}, \texttt{GmultiInhom}
  Inhomogeneous multitype/marked versions of the summary functions 
  \texttt{Fest}, \texttt{Gest}.

\item \texttt{kernel.moment}
    Moment or incomplete moment of smoothing kernel.

\item \texttt{MinkowskiSum}, \verb!%(+)%!: 
    Minkowski sum of two windows: \verb!A %(+)% B!, 
    or \texttt{MinkowskiSum(A,B)}

\item \texttt{nobjects}:
  New generic function for counting the number of 'things' in a dataset.
  There are methods for \texttt{ppp}, \texttt{ppx}, \texttt{psp}, \texttt{tess}.

 \item \texttt{parameters.interact}, \texttt{parameters.fii}:
    Extract parameters from interpoint interactions.
    (These existing functions are now documented.)

 \item \texttt{ppmInfluence}:
  Calculate \texttt{leverage.ppm}, \texttt{influence.ppm} and 
  \texttt{dfbetas.ppm} efficiently.

  \item \texttt{rppm}, \texttt{plot.rppm}, \texttt{predict.rppm}, 
    \texttt{prune.rppm}:
    Recursive-partition point process models.

 \item \texttt{simulate.mppm}
   Simulate a point process model fitted to replicated point patterns.

 \item \texttt{update.interact}:
    Update the parameters of an interpoint interaction.
    [This existing function is now documented.]

 \item \texttt{where.max}, \texttt{where.min}
    Find the spatial location(s) where a pixel image achieves its
    maximum or minimum value.
    
 \item \texttt{compileK}, \texttt{compilepcf}:
   make a $K$ function or pair correlation function
   given the pairwise distances and their weights.
   [These existing internal functions are now documented.]
    
  \item \texttt{laslett}:
  Laslett's Transform.

\item \texttt{lintess}: 
  Tessellation on a linear network.

\item \texttt{divide.linnet}:
  Divide a linear network into pieces demarcated by a point pattern.

\item \texttt{insertVertices}:
  Insert new vertices in a linear network.

\item \texttt{thinNetwork}:
  Remove vertices and/or segments from a linear network etc.

\item \texttt{connected.linnet}:
  Find connected components of a linear network.

\item \texttt{nvertices}, \texttt{nvertices.linnet}, \texttt{nvertices.owin}:
  Count the number of vertices in a linear network 
  or vertices of the boundary of a window.

\item \texttt{as.data.frame.linim}, \texttt{as.data.frame.linfun}:
  Extract a data frame of spatial locations and function values
  from an object of class \texttt{linim} or \texttt{linfun}.

\item \texttt{as.linfun}, \texttt{as.linfun.linim}, \texttt{as.linfun.lintess}:
  Convert other kinds of data to a \texttt{linfun} object.

\item \texttt{requireversion}:
    Require a particular version of a package
    (for use in stand-alone R scripts).

  \item \texttt{as.function.tess}:
   Convert a tessellation to a \texttt{function(x,y)}. The function value
   indicates which tile of the tessellation contains the point $(x,y)$.

   \item \texttt{tileindex}:
   Determine which tile of a tessellation contains a given point $(x,y)$.

   \item \texttt{persp.leverage.ppm}:
   Method for persp plots for objects of class \texttt{leverage.ppm}

   \item \texttt{AIC.mppm}, \texttt{extractAIC.mppm}:
   AIC for point process models fitted to replicated point patterns.

   \item \texttt{nobs.mppm}, \texttt{terms.mppm}, \texttt{getCall.mppm}:
   Methods for point process models fitted to replicated point patterns.

  \item \texttt{rPenttinen}:
    Simulate the Penttinen process using perfect simulation.

  \item \texttt{varcount}:
    Given a point process model, compute the predicted variance
    of the number of points falling in a window.

  \item \texttt{inside.boxx}:
    Test whether multidimensional points lie inside a specified 
    multidimensional box.
  \item \texttt{lixellate}:
    Divide each segment of a linear network into smaller segments.

  \item \texttt{nsegments.linnet}, \texttt{nsegments.lpp}:
     Count the number of line segments in a linear network.

  \item \texttt{grow.boxx}:
     Expand a multidimensional box.

   \item \texttt{deviance.ppm}, \texttt{deviance.lppm}:
     Deviance for a fitted point process model.

   \item \texttt{pseudoR2}:
     Pseudo-R-squared for a fitted point process model.

   \item \texttt{tiles.empty}
     Checks whether each tile of a tessellation is empty or nonempty.

   \item \texttt{summary.linim}:
     Summary for a pixel image on a linear network.
     
\item Determinantal Point Process models:
  \begin{itemize}
  \item \texttt{dppm}:
    Fit a determinantal point process model.
  \item \texttt{fitted.dppm}, \texttt{predict.dppm}, \texttt{intensity.dppm}:
    prediction for a fitted determinantal point process model.
  \item 
    \texttt{Kmodel.dppm}, \texttt{pcfmodel.dppm}: 
    Second moments of a determinantal point process model.
  \item
    \texttt{rdpp}, \texttt{simulate.dppm}:
    Simulation of a determinantal point process model.
  \item \texttt{logLik.dppm}, \texttt{AIC.dppm}, \texttt{extractAIC.dppm}, 
    \texttt{nobs.dppm}: Likelihood and AIC for 
    a fitted determinantal point process model.
  \item
    \texttt{print.dppm}, \texttt{reach.dppm}, \texttt{valid.dppm}: 
    Basic information about a \texttt{dpp} model.
  \item \texttt{coef.dppm}, \texttt{formula.dppm}, \texttt{print.dppm}, 
    \texttt{terms.dppm}, \texttt{labels.dppm},
    \texttt{model.frame.dppm}, \texttt{model.matrix.dppm}, 
    \texttt{model.images.dppm},  \texttt{is.stationary.dppm}, 
    \texttt{reach.dppm}, \texttt{unitname.dppm}, \verb!unitname<-.dppm!, 
    \texttt{Window.dppm}: Various methods for \texttt{dppm} objects.
  \item \texttt{parameters.dppm}: Extract meaningful list of model parameters.
  \item \texttt{objsurf.dppm}: Objective function surface of 
    a \texttt{dppm} object. 
  \item \texttt{residuals.dppm}: Residual measure for a \texttt{dppm} object.
  \end{itemize}
\item Determinantal Point Process model families:
  \begin{itemize}
  \item \texttt{dppBessel}, \texttt{dppCauchy}, 
    \texttt{dppGauss}, \texttt{dppMatern}, \texttt{dppPowerExp}:
    Determinantal Point Process family functions.
  \item \texttt{detpointprocfamilyfun}:
    Create a family function.
  \item    
    \texttt{update.detpointprocfamily}: Set parameter values in a
    determinantal point process model family.
  \item
    \texttt{simulate.dppm}:   Simulation.
  \item \texttt{is.stationary.detpointprocfamily}, 
   \texttt{intensity.detpointprocfamily}, \texttt{Kmodel.detpointprocfamily}, 
   \texttt{pcfmodel.detpointprocfamily}: Moments.
 \item \texttt{dim.detpointprocfamily}, \texttt{dppapproxkernel}, 
   \texttt{dppapproxpcf}, \texttt{dppeigen}, 
   \texttt{dppkernel}, \texttt{dppparbounds}, \texttt{dppspecdenrange}, 
   \texttt{dppspecden}:
   Helper functions.
 \end{itemize}

 \item \texttt{dg.envelope}:
   Simulation envelopes corresponding to Dao-Genton test.

 \item \texttt{dg.progress}:
   Progress plot (envelope representation) for the Dao-Genton test.

 \item \texttt{dg.sigtrace}: significance trace for the Dao-Genton test.

 \item \texttt{markcrosscorr}:
   Mark cross-correlation function for point patterns with
   several columns of marks.

 \item \texttt{rtemper}:
   Simulated annealing or simulated tempering.

 \item \texttt{rgb2hsva}:
   Convert RGB to HSV data, like \texttt{rgb2hsv}, but preserving transparency.

 \item \texttt{superimpose.ppplist}, \texttt{superimpose.splitppp}:
   New methods for 'superimpose' for lists of point patterns.

 \item \texttt{dkernel}, \texttt{pkernel}, \texttt{qkernel}, \texttt{rkernel}:
   Probability density, cumulative probability, quantiles
   and random generation from distributions used in basic one-dimensional
   kernel smoothing.

 \item \texttt{kernel.factor}:
   Auxiliary calculations for one-dimensional kernel smoothing.

 \item \texttt{spatdim}:
   Spatial dimension of any object in the \spst\ package.

 \item \texttt{as.boxx}:
   Convert data to a multi-dimensional box.

 \item \texttt{intensity.ppx}:
   Method for \texttt{intensity} for multi-dimensional
   space-time point patterns.

 \item \texttt{fourierbasis}:
   Evaluate Fourier basis functions in any number of dimensions.

 \item \texttt{valid}:
   New generic function, with methods 
   \texttt{valid.ppm}, \texttt{valid.lppm}, \texttt{valid.dppm}.
   
 \item \texttt{emend}, \texttt{emend.ppm}, \texttt{emend.lppm}:
   New generic function with methods for \texttt{ppm} and \texttt{lppm}.
   \texttt{emend.ppm} is equivalent to \texttt{project.ppm}.

 \item \texttt{Penttinen}:
   New pairwise interaction model.

  \item \texttt{quantile.density}:
   Calculates quantiles from kernel density estimates.

  \item \texttt{CDF.density}:
   Calculates cumulative distribution function from kernel density estimates.

\item \texttt{triangulate.owin}: decompose a spatial window into triangles.
\item \texttt{fitted.lppm}: fitted intensity values for a point process
  on a linear network.
  
   \item \texttt{parameters}:
   Extract all parameters from a fitted model.

 \end{itemize}
 
 
\section{Alphabetical list of changes}

Here is a list of all changes made to existing functions,
listed alphabetically.

\begin{itemize}
%%A
\item \texttt{affine.owin}:
  Allows transformation matrix to be singular, if the window is polygonal.

\item \texttt{anova.mppm}: Now handles Gibbs models,
  and performs the adjusted composite likelihood ratio test.
  New argument \texttt{fine}.
  
 \item \texttt{as.function.tess}:
    New argument \texttt{values} specifies the function values.

  \item \texttt{as.im.function}:
  New argument \texttt{strict}.

\item \texttt{as.layered}:
    Default method now handles a (vanilla) list of spatial objects.

  \item \texttt{as.linnet.psp}:
If the line segment pattern has marks, then the resulting linear network
also carries these marks in the \verb!$lines! component.

  \item \texttt{as.owin.data.frame}:
    New argument \texttt{step}

  \item \texttt{as.polygonal}:
  Can now repair errors in polygon data, if \texttt{repair=TRUE}.

%%B
 \item \texttt{bw.ppl}:
   New arguments \texttt{weights} and \texttt{sigma}.
   
%%C
 \item \texttt{cdf.test}:
   Calculations are more robust against numerical rounding effects.
   
 \item \texttt{cdf.test.mppm}:
   \begin{itemize}
   \item     Now handles Gibbs models.
   \item     Now recognises \texttt{covariate="x"} or \texttt{"y"}.
   \end{itemize}
    
 \item \texttt{clarkevans}:
    The argument \texttt{correction="all"} is now recognised: it selects
    all the available options. [This is also the default.]

  \item \texttt{clickpoly}:
    The polygon is now drawn progressively as the user clicks new vertices.

 \item \texttt{closepairs.ppp}, \texttt{closepairs.pp3}:
   \begin{itemize}
   \item New arguments \texttt{distinct} and \texttt{neat} allow more options.
   \item Argument \texttt{ordered} has been replaced by \texttt{twice}
    (but \texttt{ordered} is still accepted, with a warning).
  \item  
    Performance improved (computation time and memory requirements reduced.)
    This should improve the performance of many functions in \texttt{spatstat}.
   \end{itemize}

 \item \texttt{clusterset}:
   Improved behaviour.

 \item \texttt{clusterfit}:
   New argument \texttt{algorithm} specifies the choice 
   of optimisation algorithm.

\item \texttt{collapse.fv}:
   This is now treated as a method for the \texttt{nlme} 
   generic \texttt{collapse}.
   Its syntax has been adjusted slightly.

\item \texttt{connected.im}:
    Now handles a logical-valued image properly.
    Arguments \texttt{...} now determine pixel resolution.
    
\item \texttt{connected.owin}:    
    Arguments \texttt{...} now determine pixel resolution.

  \item \texttt{contour.im}:
   New argument \texttt{col} specifies the colour of the contour lines.
   If \texttt{col} is a colour map, then the contours are drawn 
   in different colours.

 \item \texttt{crossing.psp}:
    New argument \texttt{details} gives more information about the intersections
    between the segments.

%%D
    
  \item \texttt{dclf.test, mad.test, dclf.progress, mad.progress,} 
   \texttt{dclf.sigtrace, mad.sigtrace}, 
   \texttt{dg.progress, dg.sigtrace}:
   \begin{itemize}
   \item 
     New argument \texttt{clamp} determines the test statistic 
     for one-sided tests.
   \item 
     New argument \texttt{rmin} determines the left endpoint
     of the test interval.    
   \item 
     New argument \texttt{leaveout} specifies how to calculate
     discrepancy between observed and simulated function values.
   \item
     New argument \texttt{scale} allows summary function values to be rescaled
     before the comparison is performed.
   \item
     New argument \texttt{interpolate} supports interpolation of $p$-value.
   \item
     New argument \texttt{interpolate} supports interpolation of 
     critical value of test.
   \end{itemize}
 

 \item \texttt{default.rmhcontrol, default.rmhexpand}:
   New argument \texttt{w}.

   
 \item \texttt{density.lpp}:
   \begin{itemize}
   \item 
     New argument \texttt{kernel} specifies the smoothing kernel.
     Any of the standard one-dimensional smoothing kernels can be used.
   \item 
     Now supports both the `equal-split continuous' and 
     `equal-split discontinuous' smoothers. New argument \texttt{continuous} 
     determines the choice of smoother.
   \item 
     New argument \texttt{weights}.
   \end{itemize}
   
 \item \texttt{density.ppp}:
   \begin{itemize}
   \item A non-Gaussian kernel can now be specified
   using the argument \texttt{kernel}.
 \item Argument \texttt{weights} can now be a pixel image.
   \item Accelerated by about 15\%
     in the case where \texttt{at="points"}
     and \texttt{kernel="gaussian"}.
  \item \texttt{density.ppp}: 
     Accelerated in the cases where weights are given or \texttt{diggle=TRUE}.
   \end{itemize}

 
 \item \texttt{dfbetas.ppm}:
    For Gibbs models, memory usage has been dramatically reduced, 
    so the code can handle larger datasets and finer quadrature schemes.

    
  \item \texttt{diagnose.ppm}:
    Infinite values of \texttt{rbord} are now ignored and treated as zero.
    This ensures that \texttt{diagnose.ppm} has a sensible default
    when the fitted model has infinite reach.
  
  \item \texttt{diagnose.ppm, plot.diagppm}:
   New arguments \texttt{col.neg, col.smooth} control the colour maps.

  \item \texttt{dilation.ppp}:
    Improved geometrical accuracy.
    Now accepts arguments to control resolution of polygonal approximation.

 \item \texttt{discs}:
   \begin{itemize}
   \item     Now accepts a single numeric value for \texttt{radii}.
   \item New argument \texttt{npoly}.
   \item Accelerated in some cases. 
   \end{itemize}


  \item \texttt{distfun}:
    When the user calls a distance function 
    that was created by \texttt{distfun},
    the user may now give a \texttt{ppp} or \texttt{lpp}
    object for the argument \texttt{x},
    instead of giving two coordinate vectors \texttt{x} and \texttt{y}.

%%E
    
  \item \texttt{edge.Trans}:
    New argument \texttt{gW} for efficiency.
    
 \item \texttt{envelope}:
   \begin{itemize}
   \item 
     New argument \texttt{clamp} gives greater control
     over one-sided envelopes.
   \item  New argument \texttt{funargs}
   \item 
     New argument \texttt{scale} allows global envelopes to have 
     width proportional to a specified function of $r$,
     rather than constant width.
   \item 
     New argument \texttt{funYargs} contains arguments to the summary function
     when applied to the data pattern only.
   \end{itemize}

%%F
   
 \item \texttt{Fest}:
   Additional checks for errors in input data.
   
  \item \texttt{funxy}:
    When the user calls a function that was created by \texttt{funxy},
    the user may now give a \texttt{ppp} or \texttt{lpp}
    object for the argument \texttt{x},
    instead of giving two coordinate vectors \texttt{x} and \texttt{y}.

%%G
    
  \item \texttt{Geyer}:
   The saturation parameter \texttt{sat} can now be less than 1.
   
   \item \texttt{grow.rectangle}:
     New argument \texttt{fraction}.
%%H
   
 \item \texttt{Hest}:
   \begin{itemize}
   \item Argument \texttt{X} can now be a pixel image with logical values.
   \item New argument \texttt{W}. [Based on code by Kassel Hingee.]
   \item Additional checks for errors in input data.
   \end{itemize}
   
%%I
 \item \texttt{influence.ppm}:
    For Gibbs models, memory usage has been dramatically reduced, 
    so the code can handle larger datasets and finer quadrature schemes.

%%J
%%K

 \item \texttt{Kcross.inhom}, \texttt{Kdot.inhom}, \texttt{Kmulti.inhom}:
    These functions now allow intensity values to be given by
    a fitted point process model.
    New arguments \texttt{update}, \texttt{leaveoneout}, \texttt{lambdaX}.

 \item \texttt{Kest}
    Accelerated computation (for translation and rigid corrections)
    when window is an irregular shape.
    
 \item \texttt{Kest.fft}:
   Now has \verb!...! arguments allowing control of spatial resolution.

 \item \texttt{kppm}:
   \begin{itemize}
   \item 
     Fitting a model with \texttt{clusters="LGCP"} no longer requires the
     package \pkg{RandomFields} to be loaded explicitly.
   \item
     New argument \texttt{algorithm} specifies the choice 
     of optimisation algorithm.
     \item 
       Left hand side of formula can now involve entries 
       in the list \texttt{data}.
     \item 
    A warning about infinite values of the summary function 
    no longer occurs when the default settings are used.
    Also affects \texttt{mincontrast}, 
    \texttt{cauchy.estpcf}, \texttt{lgcp.estpcf}, \texttt{matclust.estpcf},
    \texttt{thomas.estpcf}, \texttt{vargamma.estpcf}.
  \end{itemize}
  
%%L
   
 \item \texttt{Lcross.inhom}, \texttt{Ldot.inhom}:
    These functions now allow intensity values to be given by
    a fitted point process model.
    New arguments \texttt{update}, \texttt{leaveoneout}, \texttt{lambdaX}.

 \item \texttt{lengths.psp}: New argument \texttt{squared}.
   
 \item \texttt{leverage.ppm}:
    For Gibbs models, memory usage has been dramatically reduced, 
    so the code can handle larger datasets and finer quadrature schemes.

 \item \texttt{linearK}, \texttt{linearpcf} and relatives: 
   substantially accelerated.
   
 \item \texttt{linearKinhom}:
   new argument \texttt{normpower}.
   
 \item \texttt{linearpcf}:
   new argument \texttt{normpower}.
   
 \item \texttt{linnet}:
   \begin{itemize}
   \item
     The internal format of a \texttt{linnet} (linear network) object
    has been changed. Existing datasets of class \texttt{linnet} 
    are still supported. However, computation will be faster if they
    are converted to the new format. To convert a linnet object \texttt{L}
    to the new format, use \verb!L <- as.linnet(L)!.
   \item 
    If the argument \texttt{edges} is given, then this argument
    now determines the
    ordering of the sequence of line segments. For example, the \texttt{i}-th
    row of \texttt{edges} specifies the \texttt{i}-th line segment in 
    \texttt{as.psp(L)}.
  \item New argument \texttt{warn}.
   \end{itemize}

 \item \texttt{logLik.ppm}:
   New argument \texttt{absolute}.

 \item \texttt{logLik.mppm}: new argument \texttt{warn}.
   
 \item \texttt{lpp}:
    The internal format of an \texttt{lpp} object
    has been changed. Existing datasets of class \texttt{lpp} 
    are still supported. However, computation will be faster if they
    are converted to the new format. To convert an \texttt{lpp} 
    object \texttt{X} to the new format, use \verb!X <- as.lpp(X)!.

  \item \texttt{lpp}, \texttt{as.lpp}: 
   These functions now handle the case where coordinates
   \texttt{seg} and \texttt{tp} are given
    but \texttt{x} and \texttt{y} are missing.

 \item \texttt{lppm}:
   \begin{itemize}
   \item New argument \texttt{random} controls placement of dummy points.
   \item    Computation accelerated.
   \end{itemize}

%%M
   
 \item \texttt{markcorr}:
   New argument \texttt{weights} allows computation of the weighted version
   of the mark correlation function.

 \item \texttt{mppm}:
   \begin{itemize}
   \item 
     Now handles models with a random effect component.
     (This is covered in \cite[Chap.\ 16]{baddrubaturn15}.)
   \item 
     New argument \texttt{random} is a formula specifying the random effect.
     (This is covered in \cite[Chap.\ 16]{baddrubaturn15}.)
   \item 
     Performs more checks for consistency of the input data.
   \item 
     New arguments \texttt{gcontrol} and \texttt{reltol.pql} control 
     the fitting algorithm. 
   \end{itemize}

%%N
   
 \item \texttt{nndist.lpp, nnwhich.lpp, nncross.lpp, distfun.lpp}:
   New argument \texttt{k} allows computation of $k$-th nearest point.
   Computation accelerated.

   \texttt{nnfun.lpp}: New argument \texttt{k}.
%%O
%%P
   
 \item \texttt{padimage}:
   New argument \texttt{W} allows an image to be padded out to fill any window.

 \item \texttt{pcf.ppp}:
   \begin{itemize}
   \item 
     New argument \texttt{ratio} allows several estimates of pcf to be pooled.
   \item 
     Now calculates an analytic approximation to the variance of
     the estimate of the pair correlation function 
     (when \texttt{var.approx=TRUE}).
   \item 
     Now returns the smoothing bandwidth used, as an attribute of the result.
   \end{itemize}


   
 \item \texttt{pcfinhom}:
    Default behaviour is changed when \texttt{lambda} is a fitted model.
    The default is now to re-fit the model to the data before computing pcf.
    New arguments \texttt{update} and \texttt{leaveoneout} control this.

  \item \texttt{pixellate.ppp}: 
     Accelerated in the case where weights are given.

 \item \texttt{plot.anylist}:
   \begin{itemize}
   \item 
   If a list entry \verb!x[[i]]! 
   belongs to class \texttt{"anylist"}, it will be expanded
   so that each entry \verb!x[[i]][[j]]! will be plotted as a separate panel.
   \item 
     New arguments \texttt{panel.begin.args}, \texttt{panel.end.args}
   \end{itemize}


 \item \texttt{plot.im}:
   \begin{itemize}
   \item  Now handles complex-valued images.
   \item  New argument \texttt{workaround} to avoid a bug in some MacOS
     device drivers that causes the image to be displayed
     in the wrong spatial orientation.
   \end{itemize}

 \item \texttt{plot.influence.ppm}:
   New argument \texttt{multiplot}.

 \item \texttt{plot.kppm}:
   \begin{itemize}
   \item 
   New arguments \texttt{pause} and \texttt{xname}.
 \item 
    The argument \texttt{what="all"} is now recognised: it selects
    all the available options. [This is also the default.]
   \end{itemize}

 \item \texttt{plot.leverage.ppm}:
   New argument \texttt{multiplot}.

 \item \texttt{plot.linfun}:
    Now passes arguments to the function being plotted.

   \item \texttt{plot.lpp}:
     \begin{itemize}
     \item New argument \texttt{show.network}.
     \item 
     For a point pattern with continuous marks (``real numbers'')
    the colour arguments \texttt{cols}, \texttt{fg}, \texttt{bg} can now 
    be vectors of colour values, and will be used to determine
    the default colour map for the marks.
     \end{itemize}

   \item \texttt{plot.mppm}:
   New argument \texttt{se}.
   
   \item \texttt{plot.msr}:
   Now handles multitype measures.
    New argument \texttt{multiplot}.

  \item \texttt{plot.pp3}:
    New arguments \texttt{box.front}, \texttt{box.back} 
    control plotting of the box.
    
   \item \texttt{plot.ppp}:
     \begin{itemize}
     \item  The default colour for the points is now a transparent grey,
       if this is supported by the plot device.
     \item For a point pattern with continuous marks (``real numbers'')
    the colour arguments \texttt{cols}, \texttt{fg}, \texttt{bg} can now 
    be vectors of colour values, and will be used to determine
    the default colour map for the marks.
  \item Now recognises graphics parameters for text, such as 
    \texttt{family} and \texttt{srt}
  \item 
    When \texttt{clipwin} is given, any parts of the boundary 
    of the window of \texttt{x} that lie inside \texttt{clipwin} 
    will also be plotted.
  \end{itemize}

   \item \texttt{plot.profilepl} ,\texttt{plot.quadratcount}, 
     \texttt{plot.quadrattest}, \texttt{plot.tess}:
     Now recognise graphics parameters for text, such as 
    \texttt{family} and \texttt{srt}

    \item \texttt{plot.solist}:
     New arguments \texttt{panel.begin.args}, \texttt{panel.end.args}
     
   \item \texttt{pool.fv}:
    The default plot of the pooled function no longer includes 
    the variance curves.

  \item \texttt{ppm.ppp, ppm.quad}
   New argument \texttt{emend}, equivalent to \texttt{project}.

  \item \texttt{predict.kppm, residuals.kppm}
   Now issues a warning when the calculation ignores the 
   cluster/Cox component and treats the model as if it were Poisson.
   (This currently happens in predict.kppm when se=TRUE or interval != "none",
   and in residuals.kppm when type != "raw").

  \item \texttt{predict.mppm}:
    The argument \texttt{type="all"} is now recognised: it selects
    all the available options. [This is also the default.]

  \item \texttt{print.quad}: More information is printed.
    
  \item \texttt{progressreport}
    \begin{itemize}
    \item Behaviour improved. 
    \item New arguments \texttt{state}, \texttt{tick}, \texttt{showtime}.
    \item New option: \verb!style="tk"!
    \end{itemize}


%%Q
   
 \item \texttt{quadratcount.ppp}:
   Computation accelerated in some cases.

 \item \texttt{quadrat.test.ppm}:
   Computation accelerated in some cases.

 \item \texttt{qqplot.ppm}
    Argument \texttt{expr} can now be a list of point patterns,
    or an envelope object containing a list of point patterns.
    
%%R
   
   \item \texttt{rcellnumber}:
     New argument \texttt{mu}.

   \item \texttt{rgbim, hsvim}:
   New argument \texttt{A} controls the alpha (transparency) channel.

   \item \texttt{rgb2hex, col2hex, paletteindex, is.colour, samecolour,}
   \texttt{complementarycolour, is.grey, to.grey}
   These colour tools now handle transparent colours.

   \item \texttt{rgb2hex}:
   New argument \texttt{maxColorValue}

   \texttt{rhohat.lpp}:
   New argument \texttt{random} controls placement of dummy points.

 \item \texttt{rLGCP}:
    This function no longer requires the package \pkg{RandomFields}
   to be loaded explicitly. 

  \item \texttt{rMaternI, rMaternII}:
    These functions can now generate random patterns in 
    three dimensions and higher dimensions, when the argument
    \texttt{win} is of class \texttt{box3} or \texttt{boxx}.

  \item \texttt{rmh.ppm, rmhmodel.ppm, simulate.ppm}:
   A model fitted using the \texttt{Penttinen} interaction can now be simulated.

 \item \texttt{rmh.default, rmhmodel.default}:
   \begin{itemize}
   \item 
     These functions now recognise \verb!cif='penttinen'!
     for the Penttinen interaction.
   \item 
     New arguments \texttt{nsim}, \texttt{saveinfo}.
   \end{itemize}

 \item \texttt{rose.default}
   New argument \texttt{weights}.

   \item \texttt{rose}
   New arguments \texttt{start} and \texttt{clockwise} specify the convention
   for measuring and plotting angles.

 \item \texttt{rotmean}:
   New argument \texttt{padzero}. 
   Default behaviour has changed.

   \item \texttt{rpoispp}
   Accelerated, when \texttt{lambda} is a pixel image.

 \item \texttt{rStrauss, rHardcore, rStraussHard, rDiggleGratton, rDGS, rPenttinen:}
   New argument \texttt{drop}.

   \item \texttt{rthin}
   Accelerated, when \texttt{P} is a single number.

   \item \texttt{rThomas, rMatClust, rCauchy, rVarGamma}
   When the model is approximately Poisson, it is simulated using rpoispp. 
   This avoids computations which would require huge amounts of memory. 
   New argument \texttt{poisthresh} controls this behaviour.

%%S   
      \item Simulation:
   Several basic simulation algorithms have been accelerated.
   Consequently, simulation outcomes are not identical to 
   those obtained with previous versions of \spst, even when the
   same random seed is used. To ensure compatibility with previous
   versions of spatstat, revert to the slower code by setting
   \texttt{spatstat.options(fastthin=FALSE, fastpois=FALSE)}.

   \item \texttt{simulate.ppm}
   New argument \texttt{w} controls the window of the simulated patterns.
   New argument \texttt{verbose}.
   
 \item \texttt{Smooth.ppp}:
   \begin{itemize}
   \item A non-Gaussian kernel can now be specified
   using the argument \texttt{kernel}.
   \item Argument \texttt{weights} can now be a pixel image.
   \item Accelerated by about 15\% in the case where \texttt{at="points"}
     and \texttt{kernel="gaussian"}.
   \end{itemize}

 
   \item \texttt{spatstat.options}
   New options \texttt{fastthin} and \texttt{fastpois} 
   enable fast simulation algorithms.
   Set these options to \texttt{FALSE} to reproduce results obtained with
   previous versions of \spst.

   \item \texttt{split.ppp}
   The splitting variable \texttt{f} can now be a logical vector.

   \item \texttt{step}: now works for models of class \texttt{"mppm"}.

  \item \texttt{subset.ppp}, \texttt{subset.lpp}, \texttt{subset.pp3}, 
     \texttt{subset.ppx}:
    The argument \texttt{subset} can now be any argument acceptable to
    the \verb!"["! method.

  \item summary functions
    The argument \texttt{correction="all"} is now recognised: it selects
    all the available options. 
    \begin{quote}
        This applies to
        \texttt{Fest}, \texttt{F3est}, \texttt{Gest}, 
        \texttt{Gcross}, \texttt{Gdot}, \texttt{Gmulti}, \texttt{G3est},
        \texttt{Gfox}, \texttt{Gcom}, \texttt{Gres}, \texttt{Hest}, 
        \texttt{Jest}, \texttt{Jmulti}, \texttt{Jcross}, \texttt{Jdot}, 
        \texttt{Jfox}, \texttt{Kest}, \texttt{Kinhom},
        \texttt{Kmulti}, \texttt{Kcross}, \texttt{Kdot}, \texttt{Kcom}, 
        \texttt{Kres}, 
	\texttt{Kmulti.inhom}, \texttt{Kcross.inhom}, 
        \texttt{Kdot.inhom}, \texttt{Kscaled}, \texttt{Ksector}, 
        \texttt{Kmark}, \texttt{K3est}, \texttt{Lscaled}, \texttt{markcorr}, 
        \texttt{markcrosscorr},
	\texttt{nnorient}, \texttt{pairorient}, \texttt{pcfinhom}, 
        \texttt{pcfcross.inhom}, \texttt{pcfcross}, \texttt{pcf}, 
        \texttt{Tstat}.
    \end{quote}
    
   \item \texttt{summary.ppm}:
    New argument \texttt{fine} selects the algorithm for variance estimation.

   \item \texttt{summary.owin}, \texttt{summary.im}:
    The fraction of frame area that is occupied by the window/image
    is now reported.

  \item \texttt{sumouter}:
    New argument \texttt{y} allows computation of asymmetric outer products.
  
  \item \texttt{symbolmap}:
    \begin{itemize}
    \item 
     Now accepts a vector of colour values for the arguments \texttt{col}, 
     \texttt{cols}, \texttt{fg}, \texttt{bg} if the argument \texttt{range}
     is given.
   \item New option: \texttt{shape="arrows"}.
    \end{itemize}


%%T
     
   \item \texttt{tess}:
   Argument \texttt{window} is ignored when xgrid, ygrid are given.

  \item \texttt{texturemap}:
    Argument \texttt{textures} can be missing or NULL.
    
   \item \texttt{textureplot}: 
     Argument \texttt{x} can now be something acceptable to \texttt{as.im}.
     
   \item \texttt{to.grey}
   New argument \texttt{transparent}.

%%U
   
  \item \texttt{union.owin}:
   Improved behaviour when there are more than 2 windows.

   \item \texttt{update}: now works for models of class \texttt{"mppm"}.
     
   \item \texttt{update.kppm}:
   Now handles additional arguments in any order, with or without names.
   Changed arguments. Improved behaviour.

%%V
   
   \item \texttt{valid.ppm}
   This is now a method for the generic function \texttt{valid}.

   \item \texttt{vcov.mppm}:
     Now handles models with Gibbs interactions.

   \item \texttt{vcov.ppm}:
     Performance slightly improved, for Gibbs models.

%%W
%%X
%%Y
%%Z
   
 \item \verb![<-.im!
  Accepts an array for \texttt{value}.

 \item \verb![.linnet!, \verb![.lpp!:
    New argument \texttt{snip} determines what to do with segments 
    of the network that cross the boundary of the window. 
    Default behaviour has changed.

\item \verb![.ppx!:
  The subset index \texttt{i} may now be a spatial domain
  of class \texttt{boxx} or \texttt{box3}.

   \item \verb![.ppp!
   New argument \texttt{clip} determines whether the window is clipped.

   \item \verb![.ppp!
   The previously-unused argument \texttt{drop} now determines whether 
   to remove unused levels of a factor.

   \item \verb![.pp3!, \verb![.lpp!, \verb![.ppx!, 
     \texttt{subset.ppp, subset.pp3, subset.lpp, subset.ppx}:
   These methods now have an argument \texttt{drop} which determines
   whether to remove unused levels of a factor.

 \end{itemize}
 
\section{Serious Bugs Fixed}

<<echo=FALSE,results=hide>>=
nbugs <- nrow(news(grepl("^BUG", Category), 
                   package="spatstat"))
nbugssince <- nrow(news(Version > "1.42-0" & grepl("^BUG", Category), 
                   package="spatstat"))
@ 

Hundreds of bugs have been detected and fixed in \spst.
Bugs that may have affected the user are listed in the 
package \texttt{NEWS} file. To read all these bug reports, type
<<eval=FALSE>>=
news(grepl("^BUG", Category), package="spatstat")
@ 
which currently produces a list of \Sexpr{nbugs} bugs,
of which \Sexpr{nbugssince} were detected after publication of the
book \cite{baddrubaturn15}.

Following is a list of the {\bf most serious bugs} only, in order
of potential impact.

\newcommand\bugger[4]{%
  \\  {} %
  {\small (Bug introduced in \texttt{spatstat {#1}}, {#2}; %
    fixed in \texttt{spatstat {#3}}, {#4})}%
}
  
\begin{itemize}
\item \texttt{nncross.ppp}:
  Results were completely incorrect if $k > 1$.
  \bugger{1.31-2}{april 2013}{1.35-0}{december 2013}

\item \texttt{nncross.pp3}:
  Results were completely incorrect in some cases.
  \bugger{1.32-0}{august 2013}{1.34-0}{october 2013}

 \item \texttt{cdf.test.ppm}:
    Calculation of $p$-values was incorrect for Gibbs models: 
    $1-p$ was computed instead of $p$.
  \bugger{1.40-0}{december 2014}{1.45-2}{may 2016}

\item \texttt{Smooth.ppp}:
  Results of \verb!Smooth(X, at="points", leaveoneout=FALSE)!
  were completely incorrect.
  \bugger{1.20-5}{august 2010}{1.46-0}{july 2016}
  
\item \texttt{density.ppp}:
  Values of \verb!density(X, at="points")!
  and \verb!Smooth(X, at="points")!
  were sometimes incorrect, due to omission of
  the contribution from the data point with the smallest $x$ coordinate.
  \bugger{1.26-0}{april 2012}{1.46-1}{july 2016}
  
\item \texttt{rmh}:
  
   \begin{itemize}
   \item Simulation was completely incorrect in the case of 
     a multitype point process with an interaction that does not depend
     on the marks, such as \verb!ppm(betacells, ~marks, Strauss(60))!
     due to a coding error in the \texttt{C} interface.
     \bugger{1.22-3}{march 2010}{1.22-3}{june 2011}
   \item 
     Simulation of the Area-Interaction model was completely incorrect.
     \bugger{1.23-6}{october 2011}{1.31-0}{january 2013}
   \item 
     Simulation of the Geyer saturation process was completely incorrect.
     \bugger{1.31-0}{january 2013}{1.31-1}{march 2013}
   \item 
     Simulation of the Strauss-Hard Core process was partially incorrect,
     giving point patterns with a slightly lower intensity.
     \bugger{1.31-0}{january 2013}{1.37-0}{may 2014}
   \item
   The result of simulating a model with a hard core
   did not necessarily respect the hard core constraint,
   and simulation of a model with strong inhibition
   did not necessarily converge. 
   This only happened if the first order trend was large,
   the starting state (\texttt{n.start} or \texttt{x.start}) was not given,
   and the number of iterations \texttt{nrep} was not very large.
   It occurred because of a poor choice for the default starting state.
   {\small (Bug was present since about 2010.  
     Fixed in \texttt{spatstat 1.40-0}, december 2014)}
   \item 
     Simulation was incorrect in the case of an inhomogeneous multitype model
     with \texttt{fixall=TRUE} (i.e.\ with a fixed number of points 
     of each type) if the model was segregated (i.e.\ if different types
     of points had different first order trend). 
     The effect of the error was that all types of points
     had the same first order trend.
     {\small (Bug was present since about 2010.
       Fixed in \texttt{spatstat 1.43-0}, september 2015)}
  \item 
     Simulation of the Geyer saturation process was 
     incorrectly initialised, so that the results of a short run 
     (i.e. small value of \texttt{nrep}) were incorrect, 
     while long runs were correct.
     \bugger{1.17-0}{october 2009}{1.31-1}{march 2013}
   \end{itemize}
   
 \item \texttt{linearK}, \texttt{linearpcf},
   \texttt{linearKinhom}, \texttt{linearpcfinhom}
   and multitype versions:
    These functions were sometimes greatly underestimated
    when the network had segments shorter than 10 coordinate units.
   \bugger{1.44-0}{december 2015}{1.46-2}{july 2016}

 \item \texttt{nncross}, \texttt{distfun}, \texttt{AreaInter}:
  Results of \texttt{nncross} were possibly incorrect 
  when \code{X} and \code{Y} did not have the same window. 
  This bug affected values of \texttt{distfun} and may also 
  have affected ppm objects with interaction \texttt{AreaInter}.
  \bugger{1.9-4}{june 2006}{1.25-2}{january 2012}

 \item \texttt{update.ppm}:
   If the argument \texttt{Q} was given,
   the results were usually incorrect, or an error was generated.
   \bugger{1.38-0}{august 2014}{1.38-1}{august 2014}
     
 \item \texttt{update.kppm}:
  If the call to \texttt{update} did not include a formula argument
   or a point pattern argument, then all arguments were ignored. 
   Example: \texttt{update(fit, improve.type="quasi")} was identical to 
   \texttt{fit}.
   \bugger{1.42-2}{june 2015}{1.45-0}{march 2016}
     
\item \texttt{envelope.ppm}:
   If the model was an inhomogeneous Poisson process, 
   the resulting envelope object was incorrect
   (the simulations were correct, but the envelopes were calculated
   assuming the model was CSR). 
   \bugger{1.23-5}{september 2011}{1.23-6}{october 2011}

 \item \texttt{leverage.ppm}, \texttt{influence.ppm}, \texttt{dfbetas.ppm}:
   Results were incorrect for non-Poisson processes.  
   \bugger{1.25-0}{december 2011}{1.45-0}{march 2016}

 \item \texttt{rVarGamma}:
   Simulations were incorrect; they were generated using the wrong value
   of the parameter \texttt{nu.ker}.  
   \bugger{1.25-0}{december 2011}{1.35-0}{december 2013}

 \item \texttt{rCauchy}:
   Simulations were incorrect; they were generated using the wrong value
   of the parameter \texttt{omega}.
   \bugger{1.25-0}{december 2011}{1.25-2}{january 2012}
   
\item \texttt{subfits}:
    The interaction coefficients of the submodels were incorrect
    for Gibbs models with a multitype interaction (\texttt{MultiStrauss}, etc).
   \bugger{1.35-0}{december 2013}{1.45-2}{may 2016}
   
 \item \texttt{kppm}, \texttt{matclust.estpcf}, \texttt{pcfmodel}:
    The pair correlation function of the M\'atern Cluster Process
    was evaluated incorrectly at distances close to 0.
    This could have affected the fitted parameters 
    in \texttt{matclust.estpcf()} or \texttt{kppm(clusters="MatClust")}.
    \bugger{1.20-2}{august 2010}{1.33-0}{september 2013}
    
 \item \texttt{ppm}:
   Results were incorrect for the Geyer saturation model
   with a non-integer value of the saturation parameter \texttt{sat}.
   \bugger{1.20-0}{july 2010}{1.31-2}{april 2013}
   
 \item \verb![.lpp!:
   The local coordinate \texttt{seg} was completely incorrect,
   when \texttt{i} was a window.
   \bugger{1.31-2}{april 2013}{1.45-0}{march 2016}
   
 \item \texttt{lppm}:
   For multitype patterns, the fitted model was completely incorrect
   due to an error in constructing the quadrature scheme.
   \bugger{1.23-0}{july 2011}{1.30-0}{december 2012}
   
 \item \texttt{integral.linim}, \texttt{integral.linfun}:
   results were slightly inaccurate because of a bias in the distribution of
   sample points.
   \bugger{1.41-0}{february 2015}{1.47-0}{october 2016}
   
 \item \texttt{intensity.ppm}:
   Result was incorrect for Gibbs models if the model was 
    exactly equivalent to a Poisson process (i.e. if all interaction
    coefficients were exactly zero).
   \bugger{1.28-1}{june 2012}{1.47-0}{october 2016}
   
 \item \texttt{funxy}: 
   Did not correctly handle one-line functions. 
   The resulting objects evaluated the wrong function in some cases.
   \bugger{1.45-0}{march 2016}{1.46-0}{july 2016}   
   
 \item \texttt{Geyer}:
   For point process models with the \texttt{Geyer} interaction, 
   \texttt{vcov.ppm} and \texttt{suffstat} sometimes gave incorrect answers.
   \bugger{1.27-0}{may 2012}{1.30-0}{december 2012}
   
 \item \texttt{vcov.ppm}, \texttt{suffstat}:
   These functions sometimes gave incorrect values 
   for marked point process models.   
   \bugger{1.27-0}{may 2012}{1.29-0}{october 2012}
   
 \item \texttt{diagnose.ppm}:
   When applied to a model obtained from \texttt{subfits()}, 
   in the default case (\texttt{oldstyle=FALSE}) 
   the variance calculations were incorrect.
   Consequently the dotted lines representing significance bands were 
   incorrect. An error or warning about negative variances occurred sometimes.
   However, calculations with \texttt{oldstyle=TRUE} were correct.
   The default has now been changed to \texttt{oldstyle=TRUE} for such models.
   \bugger{1.35-0}{december 2013}{1.45-0}{march 2016}

 \item \texttt{Smooth.ppp}:
   Results for \verb!at="points"! were garbled, for some values of 
   \texttt{sigma}, if \texttt{X} had more than one column of marks.
   \bugger{1.38-0}{october 2014}{1.46-0}{july 2016}
    
 \item \texttt{linearK}, \texttt{linearKinhom}:
   If any data points were located exactly at a vertex of the 
   linear network, the weights for Ang's correction were incorrect, 
   due to numerical error. This sometimes produced infinite 
   or NA values of the linear $K$ function.  
   \bugger{1.23-0}{july 2011}{1.27-0}{may 2012}

 \item \texttt{Kinhom}, \texttt{Linhom}:
   the results were not renormalised (even if \texttt{renormalise=TRUE})
   in some cases.
   \bugger{1.21-0}{december 2010}{1.37-0}{may 2014}
     
 \item \texttt{Kinhom}, \texttt{Linhom}:
   Ignored argument \texttt{reciplambda2} in some cases.
   \bugger{1.39-0}{october 2014}{1.40-0}{december 2014}

  \item \texttt{markcorrint}:
   Results were completely incorrect.
   \bugger{1.39-0}{october 2014}{1.40-0}{december 2014}

 \item \texttt{Kinhom}, \texttt{Linhom}:
   Calculations were incorrect if \texttt{lambda} was a fitted point
   process model.
   \bugger{1.38-0}{august 2014}{1.38-1}{august 2014}
     
 \item \texttt{predict.ppm}:
   Calculation of the conditional intensity omitted the edge correction
   if \texttt{correction='translate'} or \texttt{correction='periodic'}. 
   \bugger{1.17-0}{october 2009}{1.31-3}{may 2013}

 \item \texttt{varblock}:
   Calculations were incorrect if more than one column of 
   edge corrections was computed. 
   \bugger{1.21-1}{november 2010}{1.39-0}{october 2014}
   
 \item \texttt{scan.test}
   Results were sometimes incorrect due to numerical instability
   (a 'Gibbs phenomenon').    
   \bugger{1.24-1}{october 2011}{1.26-1}{april 2012}

 \item \texttt{relrisk}:
   When \verb!at="pixels"!, a small fraction of pixel values were sometimes
   wildly inaccurate, due to numerical errors. This affected the 
   range of values in the result, and therefore the appearance of plots.
   {\small (Bug fixed in \texttt{spatstat 1.40-0}, december 2014)}

 \item \texttt{selfcrossing.psp}:
   $y$ coordinate values were incorrect.   
   \bugger{1.23-2}{august 2011}{1.25-3}{february 2012}
     
 \item \texttt{predict.slrm}:
   Results of \texttt{predict(object, newdata)} were incorrect 
   if the spatial domain of \texttt{newdata}
   was larger than the original domain.
   \bugger{1.21-0}{november 2010}{1.25-3}{february 2012}
   
 \item \texttt{Lest}:
   The variance approximations (Lotwick-Silverman and Ripley)
   obtained with \texttt{var.approx=TRUE} were incorrect for \texttt{Lest}
   (although they were correct for \texttt{Kest}) due to a coding error.
   \bugger{1.24-1}{october 2011}{1.24-2}{november 2011}
 
 \item \texttt{bw.diggle}:
   Bandwidth was too large by a factor of 2.
   \bugger{1.23-4}{september 2011}{1.23-5}{september 2011}
 
 \item pair correlation functions (\texttt{pcf.ppp}, \texttt{pcfdot}, 
    \texttt{pcfcross} etc:)
    The result had a negative bias at the maximum $r$ value,
    because contributions to the pcf estimate from interpoint distances
    greater than \texttt{max(r)} were mistakenly omitted. 
    {\small (Bugs fixed in \texttt{spatstat 1.35-0}, december 2013)}
    
 \item \texttt{Kest}, \texttt{Lest}:
   Gave incorrect values in very large datasets, due to numerical overflow.
   `Very large' typically means about 1 million points in a random pattern, 
   or 100,000 points in a tightly clustered pattern.
   [Overflow cannot occur unless there are at least 46,341 points.]
   
 \item \texttt{bw.relrisk}:
    Implementation of \texttt{method="weightedleastsquares"} was incorrect
    and was equivalent to \texttt{method="leastsquares"}.
    \bugger{1.21-0}{november 2010}{1.23-4}{september 2011}
    
\item \texttt{triangulate.owin}:
   Results were incorrect in some special cases.
   \bugger{1.42-2}{june 2015}{1.44-0}{december 2015}
  
\item \texttt{crosspairs}:
   If \texttt{X} and \texttt{Y} were identical point patterns,
   the result was not necessarily symmetric
   (on some machines) due to numerical artifacts.
   \bugger{1.35-0}{december 2013}{1.44-0}{december 2015}

 \item \texttt{bdist.tiles}:
   Values were incorrect in some cases due to numerical error.
    {\small (Bug fixed in \texttt{spatstat 1.29-0}, october 2012)}
   
\item \texttt{Kest.fft}:
  Result was incorrectly normalised.
   \bugger{1.21-2}{january 2011}{1.44-0}{december 2015}
  
\item \texttt{crossdist.ppp}:
  Ignored argument \texttt{squared} if \texttt{periodic=FALSE}.
    {\small (Bug fixed in \texttt{spatstat 1.38-0}, july 2014)}

\item polygon geometry:
    The point-in-polygon test gave the wrong answer in some boundary cases.
    {\small (Bug fixed in \texttt{spatstat 1.23-2}, august 2011)}

\item \texttt{MultiStraussHard}:
    If a fitted model with \texttt{MultiStraussHard} interaction was invalid,
    \texttt{project.ppm} sometimes yielded a model that was still invalid.
    {\small (Bug fixed in \texttt{spatstat 1.42-0}, may 2015)}
    
\item \texttt{pool.envelope}:  
  Did not always respect the value of \texttt{use.theory}.
    \bugger{1.23-5}{september 2011}{1.43-0}{september 2015}

\item \texttt{nncross.lpp}, \texttt{nnwhich.lpp}, \texttt{distfun.lpp}:
  Sometimes caused a segmentation fault.
    \bugger{1.44-0}{december 2015}{1.44-1}{december 2015}

\item \texttt{anova.ppm}:
  If a single \texttt{object} was given, and it was a Gibbs model,
  then \texttt{adjust} was effectively set to \texttt{FALSE}.
  \bugger{1.39-0}{october 2014}{1.44-1}{december 2015}

\end{itemize}


\begin{thebibliography}{1}
\bibitem{badd10wshop}
A.~Baddeley.
\newblock Analysing spatial point patterns in {{R}}.
\newblock Technical report, CSIRO, 2010.
\newblock Version 4.
\newblock URL \texttt{https://research.csiro.au/software/r-workshop-notes/}

\bibitem{baddrubaturn15}
A. Baddeley, E. Rubak, and R. Turner.
\newblock {\em Spatial Point Patterns: Methodology and Applications with {{R}}}.
\newblock Chapman \& Hall/CRC Press, 2015.

\end{thebibliography}
 
\end{document}
