Can I count the number of integers in an index and store it in a variable?

7 vues (au cours des 30 derniers jours)
index = find([X] == 1)
If I have an array X and I use index to find the where the value 1 is in the array and it gives me the following output that there are 2 places where the number 1 is found at spot [3;25]
index =
3
25
Can I store the value 2 in a variable that it found 2 integers?
  1 commentaire
Stephen23
Stephen23 le 17 Sep 2017
The find is not required (logical indexing is often much more efficient than using find) The square brackets are also not needed.
nnz(X==1)

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Star Strider
Star Strider le 16 Sep 2017
Yes.
Xeq1 = numel(index);
This is how I would do it.

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