Programming challenge: U have n items in array x each of those items has an array of m items (m has the same length for all items). You have a final output array y of size n * m. You want to put all the values of each of ur n items into this final output array. After performing some operation on each value. In a loop iterating though x what is the corresponding index range within output array y? This is why indexing starts at 0 not 1. Thx #matlab for the headache