Re: splot pm3d and dgrid3d. Cannot understand the underlying details

merritt@xxxxxxxxxxxxxxxxxxxxxxxxxxx wrote in news:g68f5o$5ii$1

Think of each grid line as a Fourier transform of a slice of the data.
If you take enough Fourier terms, the grid line will be very 'ripply' and
pass through each relevant data point. But if you take only a few
low-order terms (i.e. a low pass filter) then you get a smooth curve
that is an approximate fit to the data.

Thanks Ethan. That makes sense now.