MATLAB: Sum of each row

Question

Hi,

I have a set

A=ones(2,3,4);

Here,

val(:,:,1) =

1 1 1

1 1 1

val(:,:,2) =

1 1 1

1 1 1

….

I want to create a matrix whose elements are the sum of each row of A.

The sum of the first row of val(:,:,1) should be a11 in A.

The sum of the second row of val(:,:,1) should be a12 in A.

The sum of the first row of val(:,:,2) should be a21 in A.

The sum of the second row of val(:,:,2) should be a22 in A….

How can i form this 4×2 matrix ?

Thanks in advance.

Answer 1

A = reshape(1:24,2,3,4);        % input: [n x m x k] array
val = squeeze(sum(A,2)).';      % output: [k x n] matrix