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do SMOOTH not on all data [message #32692]

Wed, 30 October 2002 07:57

David Oesch
Messages: 31
Registered: October 2000

Member

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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David Oesch - Remote Sensing Research Group

Department of Geography

University of Bern Tel : +41 (0)31 631 8020
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CH - 3012 Bern Mail: David.Oesch@giub.unibe.ch
Switzerland http://www.giub.unibe.ch/remsen

Remote Sensing is...
Staying as far away from the problem as possible.
- G. Archer, World Bank
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