interpolate

The option interpolate m,n will interpolate between grid points to generate a finer mesh. For data files, this smooths the color surface and enhances the contrast of spikes in the surface. When working with functions, interpolation makes little sense. It would usually make more sense to increase samples and isosamples.

For positive m and n, each quadrangle or triangle is interpolated m-times and n-times in the respective direction. For negative m and n, the interpolation frequency is chosen so that there will be at least |m| and |n| points drawn; you can consider this as a special gridding function.

Note: interpolate 0,0, will automatically choose an optimal number of interpolated surface points.

Note: Currently color interpolation is always linear, even if corners2color is set to a nonlinear scheme such as the geometric mean.