matlab - Concatenating cell arrays of different sizes -

it appreciated if me concatenate 2 cell arrays have different sizes. example, consider cell arrays:

a={'p' 'e' 't' 'k'; 2 3 4 6; 3 5 9 8; 5 4 1 0; 8 9 6 5}; b={'a' 'v'; 1 2; 3 4; 0 5; 6 8};  

array b have different size, depending on iteration result. want combine these cell arrays, end with

c={'p' 'e' 't' 'k';2 3 4 6; 3 5 9 8; 5 4 1 0; ...     8 9 6 5;'a' 'v' nan nan;1 2 nan nan; 3 4 nan nan;0 5 nan nan; 6 8 nan nan}; 

how can this, when sizes of a , b different each time run code?

you first need "pad" smaller cell array, can concatenate both cell arrays with standard methods. in comment question indicated want pad matrix nan. how it, assuming width of array b smaller or equal width of array a:

a={'p' 'e' 't' 'k';2 3 4 6; 3 5 9 8; 5 4 1 0;8 9 6 5}; b={'a' 'v' ;1 2; 3 4;0 5; 6 8};  sa = size(a); sb = size(b);     columns_to_pad = sa(2) - sb(2);    padding = num2cell(nan*ones(sb(1), columns_to_pad));     b_padded = [b, padding];     c = [a; b_padded];