Matlab - Accessing a part of a multidimensional array

Question

I'm trying to access a part of a multidimensional array in Matlab - it could be done like this: X(2:3, 1:20, 5, 4:7) However, neither the number of elements, nor the ranges are fixed, so I want to provide the indices from arrays - for the above example they'd be

ind1 = [2 1 5 4];
ind2 = [3 20 5 7];

For a fixed number of dimensions this is not a problem (X(ind1(1):ind2(1),...), but since they are not I'm not sure how to implement this in Matlab. Is there a way? Or should I approach this differently?

Answer 1

Using comma separated lists you can make it a more quick and friendly:

% some test data
ind1 = [2 1 5 4];
ind2 = [3 20 5 7];
X = randi(99,20,20,20,20);

% get all subscripts in column format
vecs = arrayfun(@colon,ind1,ind2,'un',0);
% extract the values
result = X(vecs{:});