How can I concatenate a large number of matrices?

Hi all,

I have N distinct matrices with the same number of columns but a different number of rows (it changes dinamically in my code).

I used this type of function to generate my matrices:

fun = @(k) A(k,:) - A(k+1:end,:)

where A is a starting matrix, fun(1) contains the differences between row1 of A and all the subsequent ones, fun(2) contains the differences between row2 and the subsequent ones and so on, up to fun(N).

Now, I would like to concatenate my resulting matrices so that I have a final matrix given by

[fun(1); fun(2); fun(3); ... ; fun(N)]

Is there a way to do this? Thanks a lot

Answer 1

[Stephen23]

C = arrayfun(fun,1:N,'uni',0);
M = vertcat(C{:})

Read about how this works:

https://www.mathworks.com/help/matlab/matlab_prog/comma-separated-lists.html

https://www.mathworks.com/matlabcentral/answers/1656435-tutorial-comma-separated-lists-and-how-to-use-them

[Gianluca Ligresti]

Thanks a lot, it works perfectly