i want to sum each row of a matrix to the next row of the same matrix and save it in a new variable. its a part of big algorithm.

let the matrix is this

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

and i want to get this

X=[1 2 3 4; 6 8 10 12; 10 11 12 13];

thanks in advance...

Answer 1

[Walter Roberson]

cumsum(A, 1)

Answer 2

[Sheharyar Mr]

its working. can we do this from nested loop.

[Walter Roberson]

Yes, you can call cumsum inside of loops.

Perhaps what you are looking for is something like

C(k+1,:) = C(k, :) + A(k+1, :)