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Math Forum » Discussions » Software » comp.soft-sys.matlab

Topic: Temporary output when assigning into slices?
Replies: 10   Last Post: Jan 27, 2013 3:53 AM

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Matt J

Posts: 4,979
Registered: 11/28/09
Re: Temporary output when assigning into slices?
Posted: Jan 23, 2013 7:02 PM
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"Bruno Luong" <b.luong@fogale.findmycountry> wrote in message <kdprb0$ka6$1@newscl01ah.mathworks.com>...
> "Matt J" wrote in message <kdpkhg$p22$1@newscl01ah.mathworks.com>...
>
> >
> > If so, why doesn't this apply to both examples? The LHS is the same in these examples.
>
> Not sure I understand, A(1,:) = ... is not the same as A(:,1) = ....

OK. Well then a 3rd example

A(:,1)=B*C(:,1);

If I'm not mistaken, this will be equivalent to

z=C(:,1); %memory allocation

A(:,1)=B*z;

All subsref operations, AFAIK, result in freshly allocated memory, even though it's not necessary here.

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