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Re: do SMOOTH not on all data [message #32685]

Wed, 30 October 2002 17:16

air_jlin
Messages: 22
Registered: July 2001

Junior Member

hi Dave,

how about setting the values of -9999 to NaN and then use the /Nan
keyword in SMOOTH? this would mean you'd convert your data to
floating, but i'm assuming that's ok with you since you're smoothing
it:

novalid=WHERE(array eq -9999)
array=FLOAT(array)
array[novalid] = !VALUES.F_NAN
result=SMOOTH(array,5,/Nan)

hope this helps!

best,
-Johnny

-------------------------------------------
Johnny Lin
CIRES, University of Colorado
Work Phone: (303) 735-1636
Web: http://cires.colorado.edu/~johnny/
-------------------------------------------

David Oesch <oesch@giub.unibe.ch> wrote in message news:<3DC00163.2010308@giub.uninovalid=WHERE(array NE -9999)be.ch>...
> Hi outthere,
>
> I just want to use SMOOTH on a 2D array. But some data are bad (-9999)
> and should not be considered in the smoothing process. Well trying to
> assign those bad data like this
> novalid=WHERE(array NE -9999)
> result=SMOOTH(array(novalid),5)
>
> DOES not work.
>
> I think the solution is using 'NaN' option, but how to I assign -9999 as
> NaN as the !VALUES.F_NAN is write protected?
>
> Cheers
>
> Dave

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[Message index]

		Re: do SMOOTH not on all data By: air_jlin on Wed, 30 October 2002 17:16
		Re: do SMOOTH not on all data By: David Fanning on Wed, 30 October 2002 08:10
		Re: do SMOOTH not on all data By: mchinand on Wed, 30 October 2002 08:05

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