One more thing: On Mon, Jul 12, 2010 at 12:55 PM, Steve Lianoglou <mailinglist.honey...@gmail.com> wrote: > Hi, > > On Mon, Jul 12, 2010 at 12:02 PM, Richardson, Patrick > <patrick.richard...@vai.org> wrote: >> I'm trying to use multiple plotting colors in my code. My first "ifelse" >> statement successfully does what I want. However, now I want anything less >> than -4.5 to be green and the rest black. I want another "col" argument but >> can only use one. How could I go about getting separate colors for anything >> above 4.5 and less than -4.5? >> >> plot(three, type="h", col=ifelse(three > 4.5, "red", "black"), >> xlim=c(0,500), ylim=range(three), lwd=2, >> xlab="Chromosome", ylab="Z-Score", font.lab=2, font=2, main="Upregulated >> Genes in Patient Sample") > > How about: > > my.colors <- ifelse(three > 4.5, "red", "black") > my.colors[three < -4.5] <- 'green' > > plot(three, type='h', col=my.colors, ...)
Depending on what you want the plot for, perhaps you might consider changing your color palette from green -> black -> red to something like blue -> black -> yellow, since many folks who are color can not differentiate green from red all that well. -- Steve Lianoglou Graduate Student: Computational Systems Biology | Memorial Sloan-Kettering Cancer Center | Weill Medical College of Cornell University Contact Info: http://cbio.mskcc.org/~lianos/contact ______________________________________________ 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.
