> Have you used persp or trans3d before? Here is a little piece of data that I am want to convert to 2d. I can plot (x,z) or (z,y). I know there is a better way to convert it to 2d. I did it long time back in my 3d geometry class. http://en.wikipedia.org/wiki/3D_projection ? Hadley -- http://had.co.nz/