Hi all. I am having a problem using color2D.matplot I am trying to visualize several different matrices under two color ranges. One color range corresponds to values less than 1 and the second color range for values greater than 1. However, the minimum value of each matrix differs and is automatically set to have the smallest value in the color range. Similarly, the maximum value of each matrix differs leading to non-uniform color scales.
Below is the function that is causing me trouble. It is designed to take as input 2 csv files with row and column headers describing a 20X20 matrix. The goal would be to modify the code below as follows. (1) if an entry is in range [0,1] the color scale should always be uniform with the minimum color being 0.5 and the maximum color being 1. (2) if an entry is in the range [1,infinity] the color scale should have minimum color value 1 and maximum color value 3. (I used infinity simply because there is no way of knowing how high the value will be beforehand). Any help would be greatly appreciated. Thanks, Jav library(plotrix) make_S_figure<-function(filename,alias){ h0 <- read.csv(file=filename,head=TRUE,sep=",",row.names=1) d =data.matrix(h0) m <- 1:20 cellcolors<-matrix(NA,nrow=20,ncol=20) cellcolors2<--matrix(NA,nrow=20,ncol=20) for(i in 1:length(m)){ cellcolors[d >= 1]<-color.scale(d[d>=1],cs1=c(1,1),cs2=c(1,0),cs3=c(1,0)) cellcolors[d<1]<-color.scale(d[d<1],cs1=c(0,1),cs2=c(0,1),cs3=c(1,1)) color2D.matplot(d,cellcolors=cellcolors,show.values=F,na.color="white",axes=FALSE,main=alias, xlab="",ylab="") axis(1,at=0.5:19.5,labels=colnames(d)) axis(2,at=0.5:19.5,labels=rev(rownames(d))) } -- View this message in context: http://r.789695.n4.nabble.com/Color2D-matplot-uniform-color-range-tp4184701p4184701.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.