Luckily I’m not extrapolating or going near the edge of the data points. Usually the interpolation will cover ~7-15 or so actual data points, and the minimum location will be within the ~3 central points.
I spent a month figuring out the right way to do the 2D PDE integration, I’m confident this is the best way. But I need better interpolation over discrete x. Do you have any specific knowledge of how to use the Kriging interpolations? That’s a completely new package I haven’t seen before. Any command suggestions or links would be helpful. Thanks again!