MATLAB: Concatenation in a loop

Question

Can we concatenate two matrices in a loop? (size of one matrix will increase after every iteration)

for me its showing this error

"Error using cat

Dimensions of matrices being concatenated are not consistent."

Answer 1

For row wise concatenation:

Here, matrix 'c' is being concatenated to matrix 'a' row wise, number of columns being constant in this case.

a = [];
c = [1 2;3 4];
for i = 1:5
    c = [1*i 2*i;3*i 4*i];
    a = [a;c];   % For row wise concatenation
end

For column wise concatenation:

Here matrix 'c' is being concatenated to matrix 'a' column wise, number of rows being constant in this case.

a = [];
c = [1 2;3 4];
for i = 1:5
    c = [1*i 2*i;3*i 4*i];
    a = [a c];  % For column wise concatenation
end

Hope this helps