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Bug in IDL CONVOL procedure [message #4744]

Fri, 14 July 1995 00:00

Ulrik Kjems
Messages: 1
Registered: July 1995

Junior Member

There seems to be a (several) bugs in the CONVOL library routine.

IDL> a=[0,1,1,1,0]
IDL> b=[1,1,1]
IDL> print,convol(a,b)
0 2 3 2 0
I believe, that the result should be
1 2 3 2 1
according to the reference manual p. 1-55.

Further, when convolving in 3D:
IDL> a=replicate(1.0,5,5,5)
IDL> b=replicate(1.0,3,3,3)
IDL> c=convol(a,b,/edge_wrap)
IDL> print,c

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[Message index]

		Bug in IDL CONVOL procedure By: Ulrik Kjems on Fri, 14 July 1995 00:00
		Re: Bug in IDL CONVOL procedure By: chase on Fri, 14 July 1995 00:00

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