In Matlab, how to replace the diagonal elements of a matrix with zeros?

With MATLAB, the simplest solution to replace the diagonal elements of a square matrix with zeros is to isolate the diagonal elements and to subtract these elements from the original matrix:

B = A - diag(diag(A))

Here is an example :

>> A=[1 2 3 ; 4 5 6 ; 7 8 9]

A =

     1     2     3
     4     5     6
     7     8     9

>> B = A - diag(diag(A))

B =

     0     2     3
     4     0     6
     7     8     0

With MATLAB, the simplest solution to replace the diagonal elements of a matrix with 0 is to isolate the diagonal elements and to substract these elements to the original matrix:

B = A - diag(diag(A))

Here is an example :

>> A=[1 2 3 ; 4 5 6 ; 7 8 9]

A =

     1     2     3
     4     5     6
     7     8     9

>> B = A - diag(diag(A))

B =

     0     2     3
     4     0     6
     7     8     0