plot.tile.list {deldir} | R Documentation |
A method for plot
. Plots (sequentially)
the tiles associated with each point in the set being tessellated.
plot.tile.list(x, verbose = FALSE, close=FALSE, pch=1, polycol=NA, showpoints=TRUE, asp=1, ...) ## S3 method for class 'tile.list': plot(x, verbose = FALSE, close=FALSE, pch=1, polycol=NA, showpoints=TRUE, asp=1, ...)
x |
A list of the tiles in a tessellation, as produced
the function tile.list() . |
verbose |
Logical scalar; if TRUE the tiles are
plotted one at a time (with a ``Go?'' prompt after each)
so that the process can be watched. |
close |
Logical scalar; if TRUE the outer edges of
of the tiles (i.e. the edges of the enclosing rectangle)
are drawn. Otherwise tiles on the periphery of the
tessellation are left ``open''. |
pch |
The plotting character for plotting the points of the
pattern which was tessellated. Ignored if showpoints
is FALSE . |
polycol |
Optional vector of integers (or NA s);
the i-th entry indicates with which colour to fill
the i-th tile. Note that an NA indicates
the use of no colour at all. |
showpoints |
Logical scalar; if TRUE the points of
the pattern which was tesselated are plotted. |
asp |
The aspect ratio of the plot; integer scalar or
NA . Set this argument equal to NA to allow the data
to determine the aspect ratio and hence to make the plot occupy the
complete plotting region in both x and y directions.
This is inadvisable; see the Warnings. |
... |
Optional arguments; not used. There for consistency
with the generic plot function. |
NULL; side effect is a plot.
The default value for verbose
was formerly TRUE
;
it is now FALSE
.
The user is strongly advised not to set the value of
asp
but rather to leave asp
equal to its default
value of 1
. Any other value distorts the tesselation
and destroys the perpendicular appearance of lines which are
indeed perpendicular. (And conversely can cause lines which
are not perpendicular to appear as if they are.)
The argument asp
is present ``just because it can be''.
Rolf Turner r.turner@auckland.ac.nz http://www.math.unb.ca/~rolf
x <- runif(20) y <- runif(20) z <- deldir(x,y,rw=c(0,1,0,1)) w <- tile.list(z) plot(w) ccc <- heat.colors(20) # Or topo.colors(20), or terrain.colors(20) # or cm.colors(20), or rainbox(20). plot(w,polycol=ccc,close=TRUE)