Saving memory by reusing a variable name?

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Uri Shalit
Uri Shalit 2011-2-22
I have a code that uses pretty large files which causes some memory problems.
In my code I have a very large sparse matrix X, which I then multiply by a small dense matrix A. My question is, does the code:
Y=AX; clear X;
use less space when compared with:
X=AX;

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回答（1 个）

Matt Tearle
Matt Tearle 2011-2-22
I'd guess they'd be the same. Matrix multiply requires having to make an intermediate variable anyway (behind the scenes, if not explicitly).

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