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Re: interpolation for resizing [message #64162 is a reply to message #64161]

Tue, 02 December 2008 20:07

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Chris writes:

> One potential issue with this approach is that IDL may interpolate
> between your 9999 values and your real data values when you expand the
> array. If you set the 9999s to !values.f_nan beforehand, then the
> interpolation will behave more sensibly.

I deliberately used CONGRID without the INTERP keyword
to avoid this problem. Nearest neighbor interpolation
does not create any data that is not present in the
original image.

Cheers,

David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")

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[Message index]

		Re: interpolation for resizing By: pgrigis on Wed, 03 December 2008 13:19
		Re: interpolation for resizing By: Chris[6] on Wed, 03 December 2008 13:02
		Re: interpolation for resizing By: pgrigis on Wed, 03 December 2008 08:36
		Re: interpolation for resizing By: David Fanning on Wed, 03 December 2008 08:25
		Re: interpolation for resizing By: bryan.s.hong on Wed, 03 December 2008 08:17
		Re: interpolation for resizing By: David Fanning on Wed, 03 December 2008 07:54
		Re: interpolation for resizing By: bryan.s.hong on Wed, 03 December 2008 07:49
		Re: interpolation for resizing By: loebasboy on Wed, 03 December 2008 05:52
		Re: interpolation for resizing By: David Fanning on Wed, 03 December 2008 05:43
		Re: interpolation for resizing By: Craig Markwardt on Wed, 03 December 2008 02:13
		Re: interpolation for resizing By: David Fanning on Tue, 02 December 2008 20:07
		Re: interpolation for resizing By: Chris[6] on Tue, 02 December 2008 20:04
		Re: interpolation for resizing By: David Fanning on Tue, 02 December 2008 15:28
		Re: interpolation for resizing By: loebasboy on Fri, 05 December 2008 00:36

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