(geography/R-deldir) Updated 1.0.6 to 1.0.9

Version 1.0-9 17/05/2023

Got rid of a spurious file tile.list.R that I had saved as a backup
in the Deldir directory.  Psigh!!!

Version 1.0-8 30/04/2023

Added argument "id" to deldir(), allowing the user to specify a
vector of identifiers/names for points.  Added at the request of
Jiangyao Chi.

In view of the foregoing, the identifiers of points need no longer
be numeric indices, whence some of the terminology in plot.deldir()
and plot.tile.list() was no longer appropriate.  Consequently:

    * changed name of argument "number" to "labelPts" in
      plot.deldir() and in plot.tile.list().

    * changed name of argument "nex" to "lex" in plot.deldir().

    * changed the name of the 4th component of the argument cmpnt_col
      in plot.deldir() from "num" to "labels".

Added function getNbrs() to list the Delaunay neighbours of
each point.  Added at the request of Jiangyao Chi.

Added functions insidePoly() and insideRect() to determine
whether points are inside an "interior" region which
may be specified either as a polygon or a rectangle.  In
the latter case the interior must be a subset of "rw",
the rectangular window with respect to which the points
are being triangulated/tessellated.

Added the results of a call to getNbrs() to the output of
tileInfo();  adjusted print.tileInfo() accordingly.

Fixed a mild glitch in plot.tile.list(); the returned value
was NULL if clipp was unspecified.  Corrected the help for
plot.tile.list() which had said that the returned value was
always null.

Tidied the code of plot.tile.list() a bit.  Amended the help
for plot.tile.list().

Adjusted message in First.R.

Version 1.0-7 26/12/2021

The function tileInfo() threw an opaque error if all tiles
were boundary tiles.  Added an error trap so as to produce
a more perspicuous error message.  Thanks to Krisztina Konya
of Ruhr-University Bochum who provided an example illustrating
the need for this error trap.

(mef)