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Jos
Posts:
1,268
Registered:
10/24/08
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Re: numel or length, which is better?
Posted:
Feb 5, 2010 7:17 AM
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"red " <828bwv@googlemail.com> wrote in message <hkh0jh$sdb$1@fred.mathworks.com>...
> Which is correct/better usage for vectors (1-by-n, n-by-1)?
LENGTH is somewhat tricky since it returns the largest of the sizes in all dimensions. It can become nasty to debug errors when you supply matrices instead of vectors.
I always use NUMEL to find the number of elements, which is as clear as it can get.
Although I do not know the internal processes going on in LENGTH and NUMEL, I assume that LENGTH requires more internal steps.
hth
Jos
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