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Re: octave vs. matlab vectorization


From: matt
Subject: Re: octave vs. matlab vectorization
Date: Tue, 15 Sep 2009 09:58:21 +0100


hi james,

good point! i have rechecked and the loop code *is* 5x quicker--this with matlab 7.5.0.338 and, i just noticed, matlab compiler 4.7.


On 14 Sep 2009, at 18:43, James Sherman Jr. wrote:

>ah, no! code 1 was *faster* under matlab! the ratio is 0.19:1
>
>i find this result quite staggering.

I ran those two codes with the matlab I have on my laptop (7.7.0.471 R2008b) and got 16.9 for the for loops code and 3.54 for the vectorized code.

I don't know why there would be such a discrepancy. This may sound dumb, but are you sure you didn't confuse the two times?



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