Use index as coordinates in a 3D scatter plot

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,

Answer 1

[Walter Roberson]

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

[Cerina Gordon]

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]

Sorry, yes, ind2sub()... Somehow I keep typing the one when I mean the other.