matlab findA==02

This command will search for all occurrences of the value 0 in the matrix A and return their indices along the second dimension of the matrix.

For example, if A is a 3x3 matrix with the following values:

A = [1 0 2; 
     0 3 4; 
     5 6 0]

The command find(A==0,2) will return the following vector:

[2; 3]

This indicates that the value 0 is found at the second and third positions along the second dimension of the matrix A.