Check the matrix result

2013 6 6
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Walter Roberson
Walter Roberson 2013-6-6

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~any(M(:))
will be true if M is entirely 0
I am not sure if your (sum) is intended to convey anything? Are you asking whether the sum over M is 0? If so then,
if ~sum(M(:))
Note, though, that this would be subject to round-off and cancellation problems; there are other techniques to use if you need to be concerned about those.

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