Hi all, I have a matrix with values between 0 and 1. I want to plot this matrix on a heat map so anything >0.05 is blue, anything <=0.05 and >0.01 is yellow, and anything else is grey. I am using the heatmap.2 function. I searched around but did not find an efficient way to set colour ranges as I described. Could anybody give some hints? Thank you in advance. Wendy [[alternative HTML version deleted]]

Hi Wendy, Simply define the breaks for the colours. Something like that : mat = matrix(runif(100,0,1), ncol=10) heatmap.2(mat, breaks=c(0,0.01,0.05,1), col=c("grey", "yellow", "blue"), dendrogram="none", trace="none") Eloi On 12-02-27 08:25 AM, Wendy Qiao wrote: > Hi all, > > I have a matrix with values between 0 and 1. I want to plot this matrix on > a heat map so anything>0.05 is blue, anything<=0.05 and>0.01 is yellow, > and anything else is grey. I am using the heatmap.2 function. I searched > around but did not find an efficient way to set colour ranges as I > described. Could anybody give some hints? Thank you in advance. > > Wendy > > [[alternative HTML version deleted]] > > _______________________________________________ > Bioconductor mailing list > Bioconductor at r-project.org > https://stat.ethz.ch/mailman/listinfo/bioconductor > Search the archives: http://news.gmane.org/gmane.science.biology.informatics.conductor > -- Eloi Mercier Bioinformatics PhD Student, UBC Paul Pavlidis Lab 2185 East Mall University of British Columbia Vancouver BC V6T1Z4