different color indicates difference magnitude
On 13/03/13 10:20, meng wrote:
Hi all: Is there a plot tool to use different color indicates difference magnitude of data? The plot is in the attachment. Many thanks.
No sure what you want exactly as there is no attachment here. Here are an example of what can be done: x <- 1:128 y <- rnorm(128, 10, 2) z <- x+y nbcol <- heat.colors(128) # standardize z to be from 1 to 128 zcol <- ((z-min(z))/(max(z)-min(z)))*127+1 # different examples plot(x, y, col=nbcol[zcol], pch=".", cex=10, bty="n") plot(x, y, col=nbcol[zcol], pch=".", cex=zcol/10, bty="n") plot(x, y, col=nbcol[128-zcol], pch=".", cex=10, bty="n") Sincerly Marc
__________________________________________________________ Marc Girondot, Pr Laboratoire Ecologie, Syst?matique et Evolution Equipe de Conservation des Populations et des Communaut?s CNRS, AgroParisTech et Universit? Paris-Sud 11 , UMR 8079 B?timent 362 91405 Orsay Cedex, France Tel: 33 1 (0)1.69.15.72.30 Fax: 33 1 (0)1.69.15.73.53 e-mail: marc.girondot at u-psud.fr Web: http://www.ese.u-psud.fr/epc/conservation/Marc.html Skype: girondot