how to draw Bipartite Matrices and Projection Matrices.

Hi

could you please let me know how can I draw the graphs like attached file?

Answer 1

[Karim]

such figures can be generated with the spy command. See below for an attempt to produce the top left figure using a bit of random data

A = zeros(450,450);
B = rand(450,800) < 0.01;
C = zeros(800,800);

M = [A B; B',C];

figure
spy(M)

[HASAN JAHANIFAR]

Thank you. could you please let me know, if I have a bipartite matrice can I draw such figure?