How can I make each cell array consistent in size?

I'm really grateful for anyone telling me how to make the all double arrays in cell equal in zise (please find attached). For instance, I want to the all double in cell with the size 1715*11. The following code doesn'y work.

>> N = cellfun(@(x) length(squeeze(x(:,1))) , P); M = max(N);

>> N1 = cellfun(@(x) length(squeeze(x(1,:))) , P); M1 = max(N1);

>> newP = cellfun(@(x) [x, zeros( size(x, 1), M1-size(x, 2) ); zeros( M-size(x, 1), M1 )], P, 'uni' , 0);

Answer 1

[Alex Sune]

N = max(cellfun('size',P,1));  
M = max(cellfun('size',P,2)); 

newP = cellfun(@(x) [x, zeros(size(x, 1), M-size(x, 2)); zeros(N-size(x, 1), M)], P, 'uni' , 0);

[Farshid Daryabor]

Thanks Alex