Colouring a 3D plot according to z-values
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Here is a script that colors a 3D plot according to the z value (height) of each point.
persp.withcol <- function(x,y,z,pal,nb.col,...,xlg=TRUE,ylg=TRUE)
{
colnames(z) <- y
rownames(z) <- x
nrz <- nrow(z)
ncz <- ncol(z)
color <- pal(nb.col)
zfacet <- z[-1, -1] + z[-1, -ncz] + z[-nrz, -1] + z[-nrz, -ncz]
facetcol <- cut(zfacet, nb.col)
par(xlog=xlg,ylog=ylg)
persp(
as.numeric(rownames(z)),
as.numeric(colnames(z)),
as.matrix(z),
col=color[facetcol],
...
)
}
dd
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