Try this —
M = randi([0 1],25)>0; % Logical Matrix
[r,c] = find(M);
figure
scatter(c, r, 75, 'sw', 'filled')
set(gca, 'Color','k', 'YDir','reverse')
axis([0 size(M,1)+1 0 size(M,2)+1])
% axis('equal')
The spy function works for this, however it does not have the ability to fill the markers, so I went with scatter instead.
figure
spy(M,'sw');
set(gca, 'Color','k')
hs.MarkerFaceColor = 'w';
Experiment to get the result you want.
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