Hi, I'm trying to create a heatmap with color ranges for different values in my matrix. For example: If x > 5 , use orange gradient if x < 1.5, use red gradient .....
Right now I have the following: orgPal<-brewer.pal(3,"Oranges") bluPal<-brewer.pal(3,"Blues") redPal<-brewer.pal(3,"Reds") grad <- ifelse(randMat > 5,orgPal,ifelse(randMat<1.5,redPal,bluPal)) hmap <- heatmap(randMat,Rowv=NULL, Colv=NULL,dendrogram="none",col = grad, scale="column",...) the problem is that all the colors become very close to white on one end of the spectrum and the orange colors, for example, start approaching red when x reaches extreme values and the heatmap loses its effect. Is there an easy way to specify a start and end range for each of my colors so that the hue does not change dramatically within each spectrum. I'm sure that I can explicitly specify all the colors within my ifelse statement but this is rather time consuming. thanks, John -- View this message in context: http://n4.nabble.com/heatmap-2-color-range-tp1293498p1293498.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.
