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

*From*: Rahul <nospam@xxxxxxxxxxxxxx>*Date*: Thu, 24 Jul 2008 02:03:54 +0000 (UTC)

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

@chauvet.bmsc.washington.edu:

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.

--

Rahul

.

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