How to find the index of a specific column in a matrix?

Hi everyone,

I'm currently comparing two matrices and want to find the index of the columns in x that appear in F. I've managed to get to the point of getting the index however I want the output to be in the correct order. So, for example, if

 x(:,1) = F(:,4), 
 x(:,2) = F(:,1), 
 x(:,3) = F(:,2), 
 x(:,4) = F(:,3), 

then the output should be [4 1 2 3]. Is there a way to do this?

The F matrix I'm using is

F = [7  0 11 -10 -1 26 1000 0 0  0 1000;
     1 -1  1   0  1  1    1 0 0  0    0;
     0  1 -1   1  0  3    0 1 0  0    0;
     1  1 -3   1  1  0    0 0 1  0    0;
     1  1  0   0  0  1    0 0 0 -1    1]

and the x matrix is

 x = [-10  0 7 11;
        0 -1 1  1;
        1  1 0 -1;
        1  1 1 -3;
        0  1 1  0]

Answer 1

[dpb]

>> [~,ib]=ismember(x.',F.','rows')
ib =
     4
     2
     1
     3
>>

[Niamh Ballinger]

That's worked a treat, thank you!