how to determine similar values in 2 equally-sized matrices (for non-zero elements which are in similar positions) ?

Question

Kate 2016-4-14

回答： Teja Muppirala 2016-4-14

Hello,

I have 2 matrices:

A = [ 1 2 4; 
      5 0 6]

and

B = [0 2 5;
     2 0 6]

I want to output a binary vector for the same values in the same col/row locations. My answer must also be for values which are non-zero.

So I would like to get as my final answer :

Final_output = [0 1 0;
                0 0 1]

Currently, I use the following code, but it cannot handle cases where a 'zero' is present in similar positions on the 2 matrices.

Wrong_Final_output = (A==B)
[0 1 0;
 0 1 1]

Kate 2016-4-14

any help ?

Answer 1

Teja Muppirala 2016-4-14

A = [ 1 2 4; 
      5 0 6];
B = [0 2 5;
     2 0 6];
Final_output = (A==B) & (A ~= 0)

This gives

Final_output =
   0     1     0
   0     0     1

You could just write this as well:

Final_output = (A==B) & A

But I think having the (A ~= 0) part in there makes it more readable.