Question

I would like to make multiple arrays with different dimensions in Matlab.
Is there a way to do this inside a “for” loop?

For example, I would like to create a matrix A with dimensions 100×100, then with 200×200,etc

Answer 1

Try using the zeros function instead of creating your array inside of a loop.

Something like:

B = zeros(m,n)
A = zeros(m,n)

This will be much faster initially (since the array is not having to be resized every time you add an element); you can then iterate over it later and add whatever values you need.

EDIT: I should clarify, the zeros function creates an m X n matrix (or an array if you leave off the second argument) and fills it with all zeros. It’s a good starting point for constructing large arrays.