MATLAB: How do you stack (using colon) a 3 dimensional matrix

colonmatrixstack matrix columnvector

I have a 3 dimensional matrix A(:,:,K) which I want to stack all the columns per value of K

I haven't found the coding for a 3 dimensional matrix (otherwise I expect to have used B = A(:) which in this case doesn't seem to work

reshape(A, [size(A,1) * size(A,2), size(A,3)])

reshape(A,10,2,3)

But it really depends on the order that you want B to have, which you did not tell us. You might need to use permute too.

Two approaches: 1. Reshape the matrix at first:

function A = insert_x_into_A(A,x,t)
siz = size(A);
A = reshape(A, [], siz(end));
A(:, t) = x(:);
A = reshape(A, siz);

2. Use a cell as index vector: EDITED: Cleaned up with Bruno's suggestion.

function A = insert_x_into_A(A,x,t)
idx(1:ndims(A) - 1) = {':'};
A(idx{:},t) = x;