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tensor multiplication [message #20082]

Wed, 17 May 2000 00:00

Daniel Luebbert
Messages: 6
Registered: May 2000

Junior Member

Hi,

does anybody out there know an efficient and elegant way (i.e., without
for-loops)
to implement a tensor multiplication in IDL?

What I mean is this:
IDL can do a matrix multiplication, e.g. if I do
c = indgen(3,4)
d = indgen(4)
then for
help, c#d
I get
LONG ARRAY[3],
and that's what I expect.

But now, when I take one more dimension, like
c = indgen(2,3,4)
d = indgen(4)
then
help, c#d
gives an error! (incompatible matrix dimensions...).
What a would like to get is obviously an
ARRAY[2,3]

Does anybody know how?

Daniel

------------------------------------------------------------ ------------
Daniel Luebbert
luebbert@slac.stanford.edu

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[Message index]

		tensor multiplication By: Daniel Luebbert on Wed, 17 May 2000 00:00
		Re: tensor multiplication By: hcp on Fri, 19 May 2000 00:00
		Re: tensor multiplication By: Daniel Luebbert on Thu, 18 May 2000 00:00
		Re: tensor multiplication By: Craig Markwardt on Thu, 18 May 2000 00:00
		Re: tensor multiplication By: Paul van Delst on Thu, 18 May 2000 00:00

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