I am working on a project which plots points over a checkerboard (representing seats for people). I would like each pixel in the image to represent each integer matrix entry. After updating my Octave from $3.8$ to $4.2$, any image takes up $\frac 14$ of the actual plot window, as seen here:

The simple code for this is as follows:
clear
hold off
A = [1,2;3,4];
image(A)
axis xy %orients to bottom left
Does anyone know how to get the image to take up the entire $2\times 2$ window, such that each pixel is the size of current image?
Thank you in advance.