Use index as coordinates in a 3D scatter plot

2017 7 14
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更新时间：2017 7 15
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Hi,
I have an n x n x n binary matrix, ex,
A(:,:,1) = [1 0; 0 1]
A(:,:,2) = [1 0;0 0]
I'd like to plot it as a 3D scatter plot with the position of each point determined by the indices of each 1. For example, the previous matrix would yield a scatter plot with points at (1,1,1), (2,2,1) and (1,1,2). What's the most efficient way to do this?
Thanks,

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Walter Roberson
Walter Roberson 2017-7-14

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[r,c,p] = sub2ind(size(A), find(A));
scatter3(r, c, p)

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Cerina Gordon
Cerina Gordon 2017-7-14
Thanks for your reply, this didn't work as written but I think you must've meant ind2sub because replacing sub2ind with that worked perfectly
Walter Roberson
Walter Roberson 2017-7-15
Sorry, yes, ind2sub()... Somehow I keep typing the one when I mean the other.

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