Join some matrices to one matrix

I have a cell array of matrix m{j} % which row numbers are different in each j

How can I bring all of them in one matrix?

For example:

m{1} = [2;3;4;7;1;20];
m{2} = [5];
m{3} = [1;2;70];

So, I need a new matrix like:

new = [2;3;4;7;1;20;5;1;2;70];

Answer 1

[Mikhail]

    new=[];
    for i=1:n % n - number of cells
        new=[new;m{i}(:)]
    end

%%% So we take each m{i}, turn it into 1 column calling m{i}(:) and join it to our new column