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Re: Delete bad data and interplate the new data [message #53023 is a reply to message #52950]

Tue, 13 March 2007 09:18

JD Smith
Messages: 850
Registered: December 1999

Senior Member

On Mon, 12 Mar 2007 02:23:54 -0700, duxiyu@gmail.com wrote:

> I have a data array.
> But there is some bad data in it.
> I want to use the interpolative data to replace these bad points.
>
> It is easy to make a procedure to do it, but I wonder whether there is
> internal procedure in IDL.

Yes, INTERPOL:

data=[1,2,3,42,5,6,7]
badval=42
bad=where(data eq badval,nbad,COMPLEMENT=good,NCOMPLEMENT=ngood)
if nbad gt 0 && ngood gt 1 then data[bad]=interpol(data[good],good,bad)

If you want to do 2D or higher-dimension interpolation, you'll need a
bit more magic.

JD

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[Message index]

		Delete bad data and interplate the new data By: duxiyu@gmail.com on Mon, 12 March 2007 02:23
		Re: Delete bad data and interplate the new data By: David Fanning on Tue, 13 March 2007 10:26
		Re: Delete bad data and interplate the new data By: JD Smith on Tue, 13 March 2007 09:18

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