how to append matrices of different sizes together

I am having three different matrices as

A = [1 2; 3 4]
B = [4 5 6; 7 8 9]
C=[10 11 12 13; 14 15 16 17]

i want to have the result in the following manner

D=[ 1 2;
    3 4;
    4 5 6;
    7 8 9;
    10 11 12 13;
    14 15 16 17]

could anyone please help me on it.

[Ajay Kumar]

Does appending 0's or NaN's work?

Answer 1

[Ameer Hamza]

In MATLAB, all the rows and columns of the matrix must be of equal length. If you just want to combine them in one variable, I suitable way is to use cell Array;

A = [1 2; 3 4]
B = [4 5 6; 7 8 9]
C= [10 11 12 13; 14 15 16 17]

D = {A,B,C}

The other option is to replace the absent entries with NaN

A = [1 2; 3 4];
B = [4 5 6; 7 8 9];
C = [10 11 12 13; 14 15 16 17];
D = {A,B,C};

mat_sizes = cellfun(@(x) size(x), D, 'UniformOutput', 0)';
max_dims = max(cell2mat(mat_sizes), [], 1);
result = cellfun(@(x,y) ...
    padarray(x, [0, max_dims(2)-size(x,2)], 'post'), ...
    D', mat_sizes, 'UniformOutput', 0);
result = cell2mat(result);