How can I count how many numbers are different from '-1'?

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Hi,
Example: Suppose we a have a matrix A
A= [1 -1 0 -1 0 0 -1 0 -1 -1 -1 -1 -1 -1 -1]
How can I count how many numbers are different from '-1'?
  2 Comments
Davide Conti
Davide Conti on 5 Nov 2019
Ok thanks, but if i wanted to do it for every line of my matrix?
For examples:
1 -1 0 -1 0 0 -1 0 -1
4 2 3 -1 0 3 1 2 -1
in this case for the first row the numbers different form '-1' are 5, in the second row they are 7.
With your loop it comes out that in the second row they are 12, because it considers the first row.

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Answers (2)

Fangjun Jiang
Fangjun Jiang on 1 Nov 2019
start with B=A~=-1

Pedro Martinez
Pedro Martinez on 1 Nov 2019
Total = sum (A==-1);
  1 Comment
Walter Roberson
Walter Roberson on 5 Nov 2019
That gives the number of rows of -1 but the user wants the number of columns that are not -1

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