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Re: Help with matrix operations [message #954 is a reply to message #952]

Tue, 27 April 1993 01:33

dan
Messages: 27
Registered: March 1993

Junior Member

In article <1rk7gs$4m6@morrow.stanford.edu>, pln@egret0.Stanford.EDU (Patrick L. Nolan) writes:
|> I have a little matrix problem that I'm trying to do without using
|> loops. So far I'm not clever enough to figure out how to do it.
|> Suppose we have
|> A = fltarr(N,N)
|> B = fltarr(N)
|> C = fltarr(N,N,N)
|> I want to have C(i,j,k) = A(i,j) + B(k)
|> for all i,j,k < N. Is there a way to do this without writing
|> ugly loops? I'm sure it's trivial, and I'll feel like a dope
|> when the first person points it out. Fire away.
|>
|> --
|> * Patrick L. Nolan (415)723-0133 *
|> * W. W. Hansen Experimental Physics Laboratory (HEPL) *
|> * Stanford University *
|> * Bitnet: PLN@SLACVM Internet: pln@egret0.stanford.edu *

How about

for k=1,n do c(*,*,k) = a(*,*) + b(k)

That has a loop but its not to ugly.

**************************************************
** Dan Bergmann dbergmann@llnl.gov **
**************************************************
--
**************************************************
** Dan Bergmann dbergmann@llnl.gov **
**************************************************

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[Message index]

		Re: Help with matrix operations By: thompson on Thu, 29 April 1993 07:48
		Re: Help with matrix operations By: zawodny on Wed, 28 April 1993 04:47
		Re: Help with matrix operations By: dan on Tue, 27 April 1993 01:33

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