Spatstat

analysing spatial point patterns

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RELEASE NOTES

spatstat 1.63-0

23 January 2020

OVERVIEW

• Compute minimum or maximum nearest-neighbour distance between
  each pair of types in a multitype point pattern.

• Important bug fix in simulations of the multitype hard core process.

• Numerous improvements and bug fixes.

• Deprecated functions have been removed.

• Version nickname: “Trees in space”

SIGNIFICANT USER-VISIBLE CHANGES

• minnndist, maxnndist
  New argument ‘by’ makes it possible to find the minimum or maximum
  nearest neighbour distance between each pair of possible types
  in a multitype pattern.

• beachcolours
  If ‘sealevel’ lies outside ‘srange’, then ‘srange’ will be extended
  to include it (without a warning).

• split<-.ppp
  The default for argument ‘un’ in ‘split<-.ppp’
  now agrees with the default for the same argument in ‘split.ppp’.

• lineardisc
  New argument ‘add’.
  Default plotting behaviour has changed.

• rmh, rmh.default
  The printed output of the debugger (invoked by snoop=TRUE)
  has been improved.

• plot.owin
  New argument ‘use.polypath’ controls how to plot
  a filled polygon when it has holes.

• plot.profilepl
  This function has now been documented, and the graphics improved.

• erode.owin, dilate.owin
  These deprecated functions have now been deleted
  (replaced by erosion.owin and dilation.owin)

• delaunay.distance, delaunay.network
  These deprecated functions have now been deleted
  (replaced by delaunayDistance, delaunayNetwork)

• dirichlet.edges, dirichlet.network, dirichlet.vertices, dirichlet.weights
  These deprecated functions have now been deleted
  (replaced by dirichletEdges, dirichletNetwork,
  dirichletVertices, dirichletWeights)

BUG FIXES

1. rmh, simulate.ppm, MultiHard
   Simulated realisations of the multitype hard core model
   were completely incorrect (the interaction was effectively removed,
   changing the model into a Poisson process).
   Fixed.

2. kppm, AIC
   For kppm models fitted with method=’clik2’, the resulting value of logLik()
   was equal to 1/2 of the correct value. This would have affected
   model comparison using AIC, and model selection using step().
   Fixed.

3. hyperframe
   Did not correctly handle date-time values (columns of class ‘Date’, etc).
   Fixed

4. rlpp
   The resulting pattern was unmarked even when it should have been multitype.
   Fixed.

5. idw
   Estimates were zero if ‘se=TRUE’ and ‘power != 2’ and ‘at=”pixels”’.
   Fixed.

6. model.matrix.mppm
   Sometimes returned a matrix with the wrong number of rows.
   Fixed.

7. nncross.ppp
   Format of output was incorrect if X was an empty pattern.
   Fixed.

8. rmh, rmh.default
   For a marked point process, the debugger did not display the marks.
   (The rmh debugger is invoked by calling rmh with snoop=TRUE).
   Fixed.

9. pairs.im, pairs.linim
   The argument ‘labels’ was sometimes ignored.
   Fixed.

10. as.im.data.frame
    Results were incorrect for factor-valued data.
    Fixed.

11. relrisk.ppp
    Crashed if there were more than 2 types of points
    and method = “leastsquares” or “weightedleastsquares”.
    Fixed.

12. as.im.nnfun
    Crashed when applied to a function generated by nnfun.psp.
    Fixed.

13. diagnose.ppm
    Crashed for some models with an error message from ‘beachcolours’.
    Fixed.

14. predict.rho2hat
    Crashed if one of the original covariates was a function
    rather than an image.
    Fixed.

15. lineardisc
    Crashed in some graphics environments.
    Fixed.

16. lineardisc
    Crashed if the network segments had marks.
    Fixed.

17. rmh
    Crashed for multitype models if ‘nsave’ was specified.
    Fixed.

18. vcov.mppm, simulate.mppm
    Crashed for multitype models with a hardcore interaction component.
    Fixed.

19. effectfun
    Crashed if ‘covname’ was not the name of a covariate appearing in
    the model and was not one of the reserved names ‘x’, ‘y’, ‘marks’.
    Fixed.

Release notes are available in raw text format here.