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Re: fastest way to element-by-element multiply matix by vector?
From: |
Benjamin Lindner |
Subject: |
Re: fastest way to element-by-element multiply matix by vector? |
Date: |
Wed, 20 Jun 2007 07:08:02 +0200 |
> > Hello all,
> > I need to element-by-element multiply an nXk matrix A by an nX1 vector
> b,
> > so
> > that the result is that each row of A is multiplied by the corresponding
> > row of
> > b. This is on the inside loop of some intense calculations, so I'd like
> > the best
> > performance. Is C = A .* repmat(b,1,k) the best way to do this?
> > Thanks, Michael
>
> given that size(A)==[n,k] and size(b)==[n,1] I would have done it simply
> as
>
> C = b*A
... which if course is NONSENSE.
messed it up with different topic - I really need a coffee first
before beginning to think...
just ignore it
benjamin
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Re: fastest way to element-by-element multiply matix by vector?, Benjamin Lindner, 2007/06/20
- Re: fastest way to element-by-element multiply matix by vector?,
Benjamin Lindner <=