search for: covervalue

...alues 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? Many thanks in advance. Francesc