overwrite matrix A with matrix B (which has another size)

Hi,

I would like to overwrite matrix_a with an extended matrix_b.

matrix_a has the dimension 19x57 and is full of data.

    matrix_b = [zeros(1,57) matrix_a] 

    matrix_a = matrix_b;

matrix_a has to be updated and I use this matrix in a loop.

The Error: "Size mismatch (size [57 x 19] ~= size [57 x 20])."

Is there any way to overwrite matrix_a with another matrix with different size?

Thanks! Greeting

Answer 1

[Henric Rydén]

matrix_b = [zeros(1,57) matrix_a];
clear matrix_a
matrix_a = matrix_b;