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Re: Interpolating Irregular 2D Data [message #8648 is a reply to message #8606]

Fri, 21 March 1997 00:00

Achim Hein
Messages: 42
Registered: February 1996

Member

Bijan Pesaran wrote:
>
> Hi,
>
> I have z=(x,y) data on a spiral and I want to sample it on a
> grid for further manipulations, specifically kernel smoothing.
>
> I don't see how to use interpolate or bilinear to do this. They both
> seem to require the input data to be on a grid already ...
>
I think there are two possibilities of soluting this problem:

First, you can oversample your signal by zero padding in the frequency
domain to get higher resolution in the time domain. If you take the
oversampling factor big enough, you can sample your data down to the
grid.
But I think the faster way is to interpolate the irregular data down to
equidistant twodimensional axis - simultaneously, you smooth your data
because of the interpolating.

Cheers

Achim
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		Re: Interpolating Irregular 2D Data By: peter on Wed, 26 March 1997 00:00
		Re: Interpolating Irregular 2D Data By: Achim Hein on Fri, 21 March 1997 00:00

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