How to detect certain values within the data?

Hello,

I am supposed to find certain value in the data set and I have to find the sum of number of times I found that certain value.

For instance, I have matrix 860 * 920 double and it is made of combinations of number 0, 1, 2.

Every time I detect 2, I need to count it and display the total count.

Im trying to use for loop.

How do I detect the certain values in matrix and add the number of detection?

Thank you.

Answer 1

[Kevin Phung]

%let M be your  860*920 matrix
number = 2; %value you are looking for
total_count = sum(sum(M==number))

no loop needed

Answer 2

[madhan ravi]

nnz(matrix==2)