Dear Gillian, See ?rainbow and its example. HTH,
Jorge On Wed, Sep 17, 2008 at 4:58 PM, Gillian Silver <[EMAIL PROTECTED]>wrote: > Hi, how can I create a rainbow gradient in R? For example, let's say I have > a plot of y = x...and I want the plot to go from red -> orange -> yellow -> > green -> blue -> etc. > Right now, I know how to do something like go from red to blue, using the > plotrix library: > > library(plotrix) > redToBlue <- > > color.scale(x,redrange=c(0,1),greenrange=c(0,1),bluerange=c(0,1),extremes=c("red","blue")) > plot(x, y, col=redToBlue) > > But I can't figure out how to make the colors a rainbow. (I don't > understand > how the redrange, greenrange, and bluerange parameters in color.scale > work.) > > Could someone please help? > > Thanks! > > [[alternative HTML version deleted]] > > ______________________________________________ > 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. > [[alternative HTML version deleted]] ______________________________________________ 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.