Insert zero columns in matrices inside a cell array

I have matrices inside the 23x1 cell that looks like this:

30x28 double
30x28 double
30x30 double
30x29 double
30x30 double
...

How do I add columns with zero at the end of the matrices so make all all of them 30x30?

Answer 1

[Stephen23]

Where C is your cell array:

for k = 1:numel(C)
    C{k}(:,end+1:30) = 0;
end

[Melody Lyu]

Thank you soo much!!