List of IDs to matrix of indexes
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Marleen van Dijk on 8 Jun 2020
I have a list containing numbers like lijst = [1,1,1,2,2,3,3,3,3];
Now I want to make a matrix/cell array which counts up like:
A = [1,2,3;
(Essentially the number in the array is equal to the row in the matrix, and the number in the matrix is equal to the index of the array)
Is there a nice way to do this?