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Re: where and NAN numbers [message #42158 is a reply to message #42152]

Wed, 12 January 2005 06:24

Haje Korth
Messages: 651
Registered: May 1997

Senior Member

Use finite function to pre-filter for nans.

<euskalmet07@ej-gv.es> wrote in message
news:36519195.0501120402.5de60fc0@posting.google.com...
> Hi dear IDL user,
>
> Maybe my question is too obvious, but I can�t guess the response.
>
> Having the vector:
>
> IDL> u = [!values.f_nan, 1, 2, 3]
>
> why is different the resulting vector in these following two WHERE
functions?
>
> IDL> print, where(u eq 3)
> 0 3
> % Program caused arithmetic error: Floating illegal operand
>
> IDL> print, where(u ge 3)
> 3
> % Program caused arithmetic error: Floating illegal operand
>
>
> Any response would be appreciated.

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[Message index]

		Re: where and NAN numbers By: Mark Hadfield on Wed, 12 January 2005 15:16
		Re: where and NAN numbers By: Haje Korth on Wed, 12 January 2005 06:24
		Re: where and NAN numbers By: maarten on Wed, 12 January 2005 04:08

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