Duplicate elements in array n times, where n is an array itself
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I have two arrays of the same length and would like to duplicate each element in the first array n times, where n is the value in the second array. Example:
A = [1 2 3]
B = [2 3 1]
then C shall be = [1 1 2 2 2 3]
How can this be done? I checked the forum and tried to play around with repmat but could not get it to work.
Any help is greatly appreciated! Thanks!