It's not clear to me how you want to convert the matrix into a geometric figure. Do you want to make it a heatmap? Or perhaps a graph or digraph? A complete graph would be:
adj = 1-eye(14);
g = graph(adj);
plot(g)
If you give a little more information, or perhaps even draw out the "geometric figure" you'd want to see for a smaller matrix:
A = magic(4)
we might be able to offer more specific suggestions.
