Problem 2953. Split array into pieces according to corresponding array
An array x of length n has values 1...m with each value appearing at least once. The values are sorted (n>=m).
A second array y of the same size should be split into elements of a cell array c such that the first element of c contains all elements of y at the positions where x=1 and so on:
x= [ 1 1 1 2 2 3 3 3 3]; y= [10 52 12 58 21 43 89 27 98]; c{1}=[10 52 12]; c{2}=[ 58 21]; c{3}=[ 43 89 27 98];
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