Simplification in 2D plot for a square matrix data

[pankaj kumarParticipant]

For a square matrix [M] ,with size NXN, have only element as 1 or zero. How I can plot this matrix as a 2D plot where 1 shown as red dot while zero as blue dot. A sample plot using has attached
for i = 1:100
for j = 1:100
if M(i,j) == 1;
plot(i,j,’r.’);
hold on, grid off
else
if M(i,j) == 0;
plot(i,j,’b.’,'Markersize’,2);
end

[cKKeymaster]

There is a function spy() meant for visualising sparse matrices, which can also be used here. spy(M) will (only) show locations of all nonzero elements of M. You can then call the same function on ~M after holding the plot and with a different colour spec like spy(~M,'r').

p.s. Seems like you attachment was declined. Please attach picture files only, like jpg or png.

• This reply was modified 9 years, 9 months ago by  cK.
• This reply was modified 9 years, 9 months ago by  cK.
• This reply was modified 9 years, 9 months ago by  cK.

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