Selecting x, y, and z variables in Contour Profiler
I'm having difficulty selecting x, y, and z axis variables for the Contour Profiler.
My dataset contains 11 columns, and while I can select the response (z) variables by selecting and dragging columns into the "Y, Prediction Formula" area, I seem to have no choice which of the remaining columns are plotted on the x and y axes.
There must be a simple way to select the x and y axes, I just can't figure it out at the moment.
Any help is much appreciated. Thanks!
Robert