Francesc Montané wrote: > Hello useRs, > > > > I have some problems when I try to plot a lattice. The lattice has 200 > columns (X value) and 5 rows (Y value), with a total of 1000 squares. I > want to plot this lattice with the squares having different colours > according to a variable value. > > > > The variable I want to plot is cover value of a shrub, and it has values > between 0 and 1. I want to plot the squares with value 1, black, the > squares with values 0, white, and the values between 0 and 1 with grey, > more or less dark depending on its proximity to 1 (dark grey) or 0 > (light grey). I have tried this: > > > > plot(x=transect41$x,y=transect41$y,asp=1, > > xlab="",ylab="", > > axes=F,pch=22,cex=1.01,lwd=0.05, > > bg=gray(1-transect41$CoverValue),col=gray(0.75)) > > plot(pch=22,cex=1.01,lwd=0.05) > > > > When I plot the lattice, I have problems because the squares have > different sizes. Moreover, some of them look like a rectangle and not a > square. > > What can I do to solve this problem? > Hi Francesc, Try this:
library(plotrix) transect<-matrix(runif(1000),nrow=5) x11(width=14,height=2.4) color2D.matplot(transect,c(1,0),c(1,0),c(1,0), main="Shrubbery",show.legend=TRUE) You will probably have to fiddle the device width/height a bit to get squares. Jim ______________________________________________ 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.
