Video tutorial: 3d indexing

Posted by Doug Hull, December 9, 2008

1 views (last 30 days) | 0 Likes | 4 comments

The MATLAB user has this:


clear
clc
M(:,:,1) = [1,2;3,4];
M(:,:,2) = [21,22;23,24];
J = [1,2; 2,1];

They want this:

ans =
[1 22
23 4]

They tried this:

D = M(:,:,J) % This doesn't work,

This video discusses this solution:

[nR, nC] = size(J);
D = zeros(nR,nC);
for r = 1:nR
     for c = 1:nC
          D(r,c) = M(r,c,J(r,c));
    end
end

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