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Topic: performance issue....
Replies: 4   Last Post: Jan 18, 2013 4:39 PM

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Registered: 12/6/04
Re: performance issue....
Posted: Jan 18, 2013 3:10 PM
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"Philipp " <metamurk@googlemail.com> wrote in message <kdc6vs$qji$1@newscl01ah.mathworks.com>...
> jap, i tried this. But with preallocation, my code becomes much more slowly because of the finds and the nnz's take muc more. So welcome to the 80's ....

I don't have MATLAB installed on this computer, but it seems to me that you are using R & R1 (as a "null" test). Perhaps instead of using FIND you could use a command such as ISMEMBER or ANY or somthing like that.

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