I believe some recent change to spplot has removed the possibility of
specifying a printing character other than the default 16 (fill=T) or 1.
The following code produces a plot of an attribute of a SpatialPointsDataFrame:
require(gstat)
data(jura)
coordinates(jura.pred) <- ~Xloc + Yloc
spplot(jura.pred, zcol="Co", col.regions=bpy.colors(64))
In the past (as of 09-Feb-2012 if not later) the it was possible to specify a
different printing character:
spplot(jura.pred, zcol="Co", col.regions=bpy.colors(64), pch=2)
and this is promised in the documentation of spplot:
pch
integer; plotting character to use; defaults to 16 if fill is TRUE, else 1
However now with sp 1.0-5, lattice 0.20-13, running under R 2.15.2, the
last-shown command prints only some of the points, all in black; the legend
shows no characters.
David Rossiter
University of Twente (NL) / Faculty ITC
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