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Re: Setting values to NaN [message #39934 is a reply to message #39933]

Fri, 25 June 2004 04:41

Klaus Scipal
Messages: 45
Registered: November 1997

Member

Hi Matt

!VALUES.F_NAN is a float but your a array is integer. Convert your a array
to float (float(a)) before setting the NaNs and it will work

Klaus

"Matt" <matt_westmore@yahoo.co.uk> wrote in message
news:c66373b9.0406250228.f6cbaf4@posting.google.com...
> Hi,
> I'd realy appreciate someone pointing out why I'm an idiot.
>
> I'm trying to set some values of an image to NaN so that they are not
> included in further calculations but I can't seem to do it!!!
>
> eg:
> a = indgen(10)
> lt5 = where(a LT 5)
> a(lt5) = !VALUES.F_NAN
> %Program caused arithmetic error: Floating illegal operand
> print, a
> 0 0 0 0 0 5 6 7 8 9
>
> Cheers
> Matt

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[Message index]

		Re: Setting values to NaN By: Craig Markwardt on Fri, 25 June 2004 13:17
		Re: Setting values to NaN By: b_gom on Fri, 25 June 2004 11:38
		Re: Setting values to NaN By: Matt Feinstein on Fri, 25 June 2004 09:34
		Re: Setting values to NaN By: Michael Wallace on Fri, 25 June 2004 09:30
		Re: Setting values to NaN By: Craig Markwardt on Fri, 25 June 2004 09:14
		Re: Setting values to NaN By: Paul Van Delst[1] on Fri, 25 June 2004 08:50
		Re: Setting values to NaN By: matt_westmore on Fri, 25 June 2004 08:27
		Re: Setting values to NaN By: David Fanning on Fri, 25 June 2004 06:43
		Re: Setting values to NaN By: Klaus Scipal on Fri, 25 June 2004 04:41
		Re: Setting values to NaN By: matt_westmore on Wed, 30 June 2004 04:37

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