MATLAB: How to access the elements of one array with another array

Question

I'd like to assign elements to an array in the following manner:

a = zeros(2,2,2);
ix=1;
iy=1;
b = [1,1];
a([ix,iy],:) = b(:)

Where ix and iy represent the position in the 1st and 2nd directions, a in it's 3rd dimension and b are the same length length. For my application ix and iy really need to be in the same array and the method needs to be applicable to N-dimensions. Is there a way to do such an assignment?

Answer 1

This is really very easy once you put those indices into a cell array:

C = {ix,iy,...,iN,':'};
a(C{:}) = b

https://www.mathworks.com/help/matlab/matlab_prog/comma-separated-lists.html

https://www.mathworks.com/matlabcentral/answers/320713-how-to-operate-on-comma-separated-lists

Given a numeric vector of indices V:

V = [ix,iy,...,iN];
C = num2cell(V);
a(C{:},':') = b;

or

a(C{:},:) = b;