Spatstat

analysing spatial point patterns

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RELEASE NOTES

spatstat 1.53-0

23 September 2017

We thank Tilman Davies and Mehdi Moradi for contributions.

OVERVIEW

• Numerous bug fixes for linear networks code.

• spatstat now requires the sub-package ‘spatstat.data’
  which contains the datasets.

• Minor enhancements and bug fixes.

• Nickname: “Tinfoil Hat”

NEW FUNCTIONS

• ”[<-.linim”
  Subset assignment method for pixel images on a linear network.

• nnfromvertex
  Given a point pattern on a linear network,
  find the nearest data point from each vertex of the network.

• tile.lengths
  Calculate the length of each tile in a tessellation on a network.

• text.ppp, text.lpp, text.psp
  Methods for ‘text’ for spatial patterns.

SIGNIFICANT USER-VISIBLE CHANGES

• datasets
  All datasets installed in ‘spatstat’ have now been moved
  into the sub-package ‘spatstat.data’. This should not have any effect
  on normal use. The ‘spatstat.data’ package is automatically loaded
  when spatstat is loaded, and the datasets are lazy-loaded so that
  they are available in the usual way. To list all datasets you now need
  to type ‘data(package=”spatstat.data”)’

• nbfires
  This dataset now includes information about the different
  land and sea borders of New Brunswick.

• rhohat
  New argument ‘subset’ allows computation for a subset of the data.

• predict.lppm
  Argument ‘locations’ can now be an ‘lpp’ object.

• ewcdf
  Argument ‘weights’ can now be NULL.

• plot.msr
  New arguments ‘equal.markscale’ and ‘equal.ribbon’.

• plot.im
  The number of tick marks in the colour ribbon can now be controlled
  using the argument ‘nint’ in ‘ribargs’.

• plot.symbolmap
  New argument ‘nsymbols’ controls the number of symbols plotted.

• square
  Handles a common error in the format of the arguments.

• [.linim
  More robust against artefacts.

• [.linnet
  More robust against artefacts when the subset index is a pixel mask.

• linim
  The image Z is now automatically restricted to the network.
  New argument ‘restrict’.

• plot.linim
  When style=”width”, negative values are plotted in red (by default).
  New argument ‘negative.args’ controls this.

• plot.linim
  New argument ‘zlim’ specifies the range of values to be mapped.

• Summary.linim
  Recognises the argument ‘finite’ so that range(x, finite=TRUE)
  works for a linim object x.

• identify.psp
  Improved placement of labels.
  Arguments can be passed to text.default to control the plotting of labels.

• as.polygonal
  Accelerated when w is a pixel mask.

• density.lpp
  Accelerated in the default case.

• Kinhom
  Stops gracefully if ‘lambda’ contains any zero values.

• print.linim
  Prints more information.

BUG FIXES

1. with.msr
   The value of ‘atommass’ was incorrect, due to a coding error.
   Fixed.

2. [.linim
   Internal data was sometimes corrupted.
   Fixed.

3. as.linim
   The result had incorrect internal format when Window(X) was a mask
   and one of the arguments ‘eps’, ‘dimyx’, ‘xy’ was present.
   Fixed.

4. as.im.im
   If W was a rectangle or polygonal window, the pixel resolution of the
   result was determined by the spatstat defaults, rather than being
   determined by the image argument X. This was contrary to the
   rule advertised in help(as.im).
   Fixed.

5. density.lpp
   In the ‘slow’ case (kernel not Gaussian, or continuous=FALSE),
   occasionally a pixel could incorrectly be assigned the value 1.
   [Spotted by Mehdi Moradi.]
   Fixed.

6. ”[.solist”
   Ignored the “…” arguments in some cases.
   Fixed.

7. density.lpp
   Ignored the resolution arguments ‘eps’, ‘dimyx’ in the default case.
   Fixed.

8. plot.msr
   Plotted the panel titles on top of each other, if how=”contour”.
   Fixed.

9. contour.im
   Plotted the title text at the wrong place when add=TRUE and show.all=TRUE.
   Fixed.

10. predict.lppm
    Crashed if ‘locations’ was an ‘lpp’ object.
    Fixed.

11. plot.ppp
    Crashed if the window had height 0 and width 0
    and the pattern had several columns of marks.
    Fixed.

12. plot.solist
    Crashed if all panels had windows of height 0 and width 0.
    Fixed.

13. linearK, linearKinhom, linearpcf, linearpcfinhom
    Crashed if the linear network was disconnected and one component
    of the network contained fewer than 2 points.
    Fixed.

14. integral.linim
    Crashed in some cases.
    Fixed.

15. ”[.linim”
    Crashed in some cases.
    Fixed.

Release notes are available in raw text format here.