How to change axis of figure and shift matrix?

I am trying to plot my matrix, which represents head mask (matrix 257x257) and skull mask (matrix 257x257). I need to adjust x and y axes, that ranges are from -128 to 128 and not from 1 to 257.

When I try to use xlim() and ylim() functions, axes are adjusted, but my matrix is still in a range from 1 to 257, which cause an only a quarter of the matrix is shown.

How can I plot the whole matrix but with adjusted axes od -128 do 128? It means, center of the head (and skull) will be at [0, 0].

figure;
imagesc(head_mask + skull_mask);
xlim([-128 128]);
ylim([-128 128]);

Answer 1

[Adam Danz]

Specify the x and y coordinates using the syntax imagesc(x,y,C)

x and y are merely 1x2 vectors of axis limits so it should be quite straightforward to implement.

[Mária Masárová]

Thank u very much :)