Question

I have an AxB matrix and two binary column vectors, Ax1 and Bx1 in Matlab.
How can i select the rows of the matrix corresponding to 1 of Ax1 vector?
Obviously, I have to do the same operation on the column with the other vector.

Thanks in advance

Answer 1

Pretty straightforward, e.g. :

 AxB = [1  2   3   4;
        5  6   7   8;
        9  10  11  12];
 Ax1 = [0 1 1];
 Bx1 = [1 0 1 0];

 A_rows = AxB(Ax1 == 1,:);
 B_cols = AxB(:,Bx1 == 1);

Results:

A_rows:

     5     6     7     8
     9    10    11    12

B_cols:  

     1     3
     5     7
     9    11