I need a function to identify if a number is part of a vector or matrix.

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I don't need to know the number or position, I just need to know if a number belongs to a vector or matrix.I use the ismember function, but it is very slow when I repeat this many times, I would like an alternative.
The only consideration is that it has to be a function or quick code.


Stephen 2021 年 9 月 21 日
Where M is your matrix and N is your scalar number:

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