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### showColors.R
showColors <- function(col = IDPcolorRamp(20),
ntm = min(length(col),20),
border = TRUE, mar = rep(0,4))
## Shows Colors produced by a color vector and labels them by the
## index of the color vector
## Author: Rene Locher
## Version: 2009-02-19
{
opar <- par(no.readonly = TRUE)
par(mar = mar)
on.exit(opar)
lim <- 0:length(col)
col.range <- c(0,length(col))
plot(x=c(0,1), y=col.range,
xlim=c(0, 1), ylim=col.range,
type="n", ann=FALSE, axes=FALSE)
cx <- par("cxy")[1]
box.width <- min(3*cx,1-4*cx)
if(border) rect(0, lim[-length(lim)], box.width,
lim[-1], col=col) else
rect(0, lim[-length(lim)], box.width, lim[-1], col=col, border=col)
if(ntm>0){
ap <- pretty(lim[-1],n=ntm)
text(box.width+cx, ap-0.5, labels=paste(ap),adj=0)
}
} ## showColors
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