MATLAB: Find rows in matrix A that contain value x, find() fails

Question

I have a 472944 x 5 matrix and I need to locate rows have at least a single occurence of value x=0 in their four first (1:4) elements.

find(A==0); for some reason returns only some of the rows

I have attached the data

Answer 1

This will return a logical vector the same length as the number of rows in your matrix. 'True' values (1) mark rows that have at least one 0-value in the first four columns.

rowIdx = any(A(:,1:4) == 0, 2);

This will return the row numbers

rowNum = find(any(A(:,1:4) == 0, 2));