Hi Dacian,
indexing an expression (e.g. randi(100,10,1)(1:2:9)) is not possible in Matlab.
Here is a workaround using groupsummary() that generates 10 random integers between 1 and 100 and returns the numbers at odd indices:
groupsummary(randi(100,10,1), reshape(repmat(1:2:10,2,1),[],1), @(x)x(1))
You can also put this into an anonymous function (although if creating an anonymous function first is an option, there would be much simpler solutions, of course):
randi_oddIdx = @(imax,n)groupsummary(randi(imax,n,1), reshape(repmat(1:2:n,2,1),[],1), @(x)x(1))
Note that this only works for even numbers of random integers!
Best, Konrad
