Plotting matrix coordinates with indices?

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Joshua
Joshua 2013-7-17
If I have a matrix with '0's and '1's, how can i make a 2D plot of points with coordinates corresponding to the cell indices of the '1's?
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Matt Kindig
Matt Kindig 2013-7-17
Are the '0's and '1's actually part of a numeric matrix, or do you mean the actual characters '0' and '1', as part of a char matrix or a cell array? If it is numeric, the spy() function should do what you want.
doc spy

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Evan
Evan 2013-7-17
编辑：Evan 2013-7-17
If I understand correctly, I think imagesc would work:
M = eye(50); %example matrix
imagesc(M)

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