Extracting a column vector from a 3D matrix

Hi

I have a 3D matrix (A) with dimension of (10,10,320).

If I label the column vectors(320,1) with 1 - 100, I will get 100 column vectors with dimension of (320,1).

My question is that if there is a way to extract or find out one specific column vector from the 3D matrix if I have the index number between 1 and 100.

For example, if I know the index number is 10, I will look for the elements which situate at (10,1,:) of the 3D matrix (A). But is there a way to ask MATLAB to do it?

Thank you very much

Tommy

Answer 1

[Andrei Bobrov]

l = 10;

s = size(A);
[ii,jj] = ind2sub(s(1:2),l);
out = A(ii,jj,:);

other way

C = zeros(size(A));
C(l) = 1;
out = A(cumsum(C,3) > 0);

[Tommy]

Hi Andrei

Thank you very much for your help.

This works perfectly.

Thanks

Tommy