Re: simple vector to matrix transformation

[Jim Van Zandt]

On Tue, 22 Jun 1999, Daniel Heiserer wrote:
> b=a*ones(1,4);

Seesh.  I should have thought of that.

address@hidden writes:
>   On my machine, this is a factor of 6 or so faster still in Matlab,
>   anyway:
>
>   >> tic; b=a(:,ones(1,1000)); toc
>   elapsed_time =
>       0.0562

I would NOT have thought of that.  Thanks!

(BTW the speedup on my machine is about a factor of two, for the
1000x1000 problem.)

                        - Jim Van Zandt



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