Parametric-Surface
You need to have at least three matrix objects in the same matrixsheet.
Activate the matrixsheet.
From the menu, choose Plot > 3D : Parametric Surface.
(Installed to the Origin program folder).
To make this plot, you need a matrix sheet with at least 3 matrix objects.
The 1st object contains Z values, and the 2nd & 3rd objects should contain X & Y values. The 4th optional object will be for coloring.