How to put three coordinates in an element of a matrix?

What I'm trying to do is to put the coordinates of velocity vectors into the elements of a 2 dimensional matrix. (That is, I have to store velocity data (3x1 vector) for a rectangular cross section, which is represented by a two dimensional matrix.) After I filled it with velocity data I need to be able to access its elements with for loops.

Any ideas how to do it? Velocity_matrix(i,j) = [Vx Vy Vz] obviously does not work.

I would like to be able to access the elements with something like: for i=1:N for j=1:M W=Velocity_matrix(i,j); ... end end

Thank you for your answers in advance.

Answer 1

[Walter Roberson]

Cell arrays

Velocity_matrix{i,j} = [Vx Vy Vz];

and access like

for i=1:N
  for j=1:M
    W = Velocity_matrix{i,j};
    ...
  end
end

Notice the curly brackets.