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Re: NULL value in IDL ? [message #42317]

Wed, 02 February 2005 07:03

K. Bowman
Messages: 330
Registered: May 2000

Senior Member

In article <ctq3og$76u$2@news.u-strasbg.fr>,
Jerome Colin <jcolin@ulp.u-strasbg.fr> wrote:

> search=WHERE(data le 0.) & data(search)=!values.f_NaN
>
> And if I use :
>
> search=WHERE(newdata eq !values.f_nan)
>
> it returns -1.
>
> What kind of operator can be used to identify NaN cells in my array ?

You need to use

i = WHERE(~FINITE(newdata), count)
IF (count GT 0) THEN newdata[i] = 0

Cheers, Ken Bowman

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[Message index]

		Re: NULL value in IDL ? By: K. Bowman on Wed, 02 February 2005 07:03
		Re: NULL value in IDL ? By: Jerome Colin on Wed, 02 February 2005 00:58
		Re: NULL value in IDL ? By: Jerome Colin on Wed, 02 February 2005 00:28
		Re: NULL value in IDL ? By: David Fanning on Tue, 01 February 2005 11:30

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