problem of matrix operations

i have a n*n matrix. i want to obtain (row number-column number) matrix.for a 4*4 matrix result should be

[0 -1 -2 -3;

   1 0 -1 -2;

   2 1 0 -1;

   3 2 1 0];
i want to do this for any (n*n) matrix.is there any method to do this.

Answer 1

[Honglei Chen]

You can do

rownumber = 4
colnumber = 4
bsxfun(@minus,(1:rownumber)',1:colnumber)

Or considering the special form of this matrix, you can just do

toeplitz((0:rownumber-1)',0:-1:-colnumber+1)

[mahesh chathuranga]

thnk you verymuch

Answer 2

[Azzi Abdelmalek]

a=rand(4)  % Example
n=size(a,1)
bsxfun(@minus,repmat((1:n)',1,n),(1:n))

[mahesh chathuranga]

thanks

Answer 3

[Andrei Bobrov]

toeplitz(0:3,-(0:3))

[mahesh chathuranga]

thank you