Accessing an array element whose subscript is stored in a vector

Hello Everybody,

Given an array e.g. A=[[1,2,3];[4,5,6];[7,8,9]]

I would like to access an element in the array, whose index is stored in a vector e.g. ind=[2,2]

A(ind(1),ind(2)) should return 5 and works fine, but only as long as the array is 2-dimensional. I would like to make this work for arbitrary dimensions (the vector would have the according dimension).

Thanks in advance,

Christian

Answer 1

[Oleg Komarov]

A = [1,2,3
     4,5,6
     7,8,9];
% Add third dimension
A(:,:,2) = A+9; 
% Index
ind = [2,3,2];
ind = num2cell(ind);
A(sub2ind(size(A),ind{:}))

[Christian]

Perfect, thanks a lot!!