plotmap
, map.identify
, and the
levelplot
methods internally use the same gateway
function to levelplot
. Thus
transform.factor
can be used with all of them and
the panel function defaults to
panel.levelplot.raster
for all
three. Two special column names, .rownames
and
.wavelength
may be used. levelplot
plots the spectra matrix.
plotvoronoi
calls plotmap
with different
default settings, namely the panel function defaults to
panel.voronoi
.
panel.voronoi
depends on
either of the packages 'tripack' or 'deldir' being
installed. For further information, please consult the
help page of panel.voronoi
.
On the chondro
data set, plotmap
is
roughly 5 times faster than plotvoronoi
using
tripack, and ca. 15 times faster than plotvoronoi
using deldir. Package tripack, however, is free only for
non-commercial use. Also, it seems that tripack version
hang (R running at full CPU power, but not responding nor
finishing the calculation) for certain data sets. In this
case, mix = TRUE
may help.
map.identify
calls plotmap
and
plotvoronoi
, respectively and waits for (left)
mouse clicks on points. Other mouse clicks end the input.
Unlike panel.identify
, the indices
returned by map.identify
are in the same order as
the points were clicked. Also, multiple clicks on the
same point are returned as multiple entries with the same
index.
map.identify
uses option debuglevel
similar
to spc.identify
: debuglevel == 1
will plot the tolerance window if no data point was
inside (and additionally labels the point) while
debuglevel == 2
will always plot the tolerance
window.
The map.sel.*
functions offer further interactive
selection, see map.sel.poly
.