Hi, I was just trying to get a heatmap of sorts with data that has only 3 values (-1,0,1). For example: ---------------------------------- library(stats) eg <- matrix(-1:1,10,10) rownames(eg) <- LETTERS[1:10] colnames(eg) <- c(1:10) heatmap(eg) ------------------------------- However, the heatmap that I get has 5 colors. What do I need to do so that only 3 colors (each representing one of 1,0,-1) are displayed? thanks! [[alternative HTML version deleted]]

Hi Tim, Tim Smith wrote: > Hi, > > I was just trying to get a heatmap of sorts with data that has only 3 values (-1,0,1). For example: > > ---------------------------------- > library(stats) > eg <- matrix(-1:1,10,10) > rownames(eg) <- LETTERS[1:10] > colnames(eg) <- c(1:10) > heatmap(eg) > > ------------------------------- > > However, the heatmap that I get has 5 colors. What do I need to do so that only 3 colors (each representing one of 1,0,-1) are displayed? Specify the colors directly: heatmap(eg, col = c("red","green","black")) Best, Jim > > thanks! > > > > [[alternative HTML version deleted]] > > _______________________________________________ > Bioconductor mailing list > Bioconductor at stat.math.ethz.ch > https://stat.ethz.ch/mailman/listinfo/bioconductor > Search the archives: http://news.gmane.org/gmane.science.biology.informatics.conductor -- James W. MacDonald, M.S. Biostatistician Hildebrandt Lab 8220D MSRB III 1150 W. Medical Center Drive Ann Arbor MI 48109-0646 734-936-8662