|
|
| Author |
Message |
| Neil |
 Posted: Sun Oct 03, 2004 11:39 pm |
|
|
|
|
Does anyone know if there is an array operator that can be used to
multiply to 1D vectors together that results in a final 1D vector that
holds all multiplicative combinations of the individual vector
components?
For example, array A of length m, and array B of length n would result
in a vector C of length m x N. Of course i can use array operators #
or ## to create a 2D array from the individual 1D arrays and then
unfold it back into a 1 D array. However, it would be convenient to
have a straight routine for this.
This would be useful for array address, where you want to replace
nested do loops with vector processing, where you would use such a
routine to calculate the indices to enable fast array addressing.
many thanks,
Neil
|
|
| Back to top |
|
| Craig Markwardt |
| Posted: Sun Oct 03, 2004 11:53 pm |
|
|
|
|
nasalmon@onetel.net.uk (Neil) writes:
Quote: Does anyone know if there is an array operator that can be used to
multiply to 1D vectors together that results in a final 1D vector that
holds all multiplicative combinations of the individual vector
components?
For example, array A of length m, and array B of length n would result
in a vector C of length m x N. Of course i can use array operators #
or ## to create a 2D array from the individual 1D arrays and then
unfold it back into a 1 D array. However, it would be convenient to
have a straight routine for this.
Hmm, but since you can do
C = REFORM(A # B, M*N)
that doesn't seem like too much of a burden. I never know which
operator, # or ##, is going to work though.
Craig
--
--------------------------------------------------------------------------
Craig B. Markwardt, Ph.D. EMAIL: craigmnet@REMOVEcow.physics.wisc.edu
Astrophysics, IDL, Finance, Derivatives | Remove "net" for better response
--------------------------------------------------------------------------
|
|
| Back to top |
|
|
|
All times are GMT
The time now is Wed May 16, 2012 10:21 pm
|
|
