Matlab element-wise division by zero

Question

I have two matrices, say X = [1 2; 3 4; 5 6] and Y = [0 1; -1 1; 1 1]. I want to perform element-wise division X./Y, but I need a way to ignore all the zeros in Y.

Answer 1

Use this -

out = X./Y      %// Perform the elementwise division
out(Y==0)=0     %// Select the positions where Y is zero and 
                %// set those positions in the output to zero

Output -

X =
     1     2
     3     4
     5     6
Y =
     0     1
    -1     1
     1     1
out =
     0     2
    -3     4
     5     6