Finding Max difference between column vectors

I have a set of data in an array (about 3450x8) and I need to find the maximum difference between columns 5 and 6, is there an easy way to do this in Matlab? Also is there a way for it to then tell me which row that the maximum difference is in? Many thanks in Advance

Answer 1

[Cedric]

If it is in absolute value:

 [M, I] = max( abs( A(:,5) - A(:,6) ))

and otherwise remove the call to ABS.

PS: if you want to find all rows where the max occurs (if there can be multiple), you will have to do it as follows:

 absDiff = abs( A(:,5) - A(:,6) ) ;
 M = max( absDiff ) ;
 I = find( absDiff == M ) ;