Hi, The script below is my current coding in order to produce a contour plot of temperature across altitude and time. In my case, time,altitude and temperature are represented by x, y and z variables.
############################################## Brazilan.Pallete <- colorRampPalette(c("blue","green","yellow","red")) image.plot(x, y, z, col = Brazilan.Pallete(50)) contour(x,y,z, levels = seq(1, 40, by = 1), add = TRUE, col = 'peru') ############################################## The plot worked fine but i found difficult to fix the interval of the color corresponding to z value. In my case, the range of z values is between 1 and 40 and i'd like to fix the color in the image correspoding to four sub-intervals of z values. For instance: 1. 1 < z < 10 : blue 2. 11 < z < 20: green 3. 21 < z < 30: yellow 4. 31 < z < 40 : red. I did't find a suitable code to do this. Could someone please give an advice on this matter? Thank you. Fir ______________________________________________ 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.