Luis Naver wrote: > I have a list of observations that are -1, 1 or 0. I would like to > represent them in a horizontal bar color coded based on value like a > stacked bar graph. I can achieve this in the form of a png with the > following code: > > A = floor(runif(10)*3) - 1 > > png(width=100, height=10) > par(mar=c(0,0,0,0)) > image(matrix(A), col=grey(c(0.1, 0.5, 0.9))) > dev.off() > > However I would like to do this with one of the standard plotting > tools (i.e. barplot) to take advantage of labels and multiple > series. Any help would be appreciated. > Hi Luis, I understood your request as wanting a single horizontal bar with 10 segments, each colored according to the value of A. If this is correct, you might want:
library(plotrix) plot(1,xlim=c(-1,1),ylim=c(-1,1),xlab="",ylab="",type="n",axes=FALSE) gradient.rect(-1,-0.1,1,0.1,col=grey(c(0.1,0.5,0.9))[A+2]) Jim ______________________________________________ R-help@stat.math.ethz.ch 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.
