Here is my problem. I have some data in excel format organized in three columns of x, y, z values. I am able to import the data in maple via the assistant tool and create a 3d surface plot. Now I would like to create a 2d contour plot on the x-y plane and possibly put the 3d surface and the 2d controur plot together. Do you think this is doable without changing the data format? I have looked for other posts, but none of them seems to highlight the data format problem. Thanks in advance, regards, Man