MATLAB: Recoding unique numbers to another number

arrayMATLABmatrixunique

Hi I have this array of numbers [5 5 6 6 6 11 11 ]and would like to convert every unique number from 1 to n. For example, if there are 10 unique numbers, I would like to relabel them from 1 to 10, with the same number coded the same for eg [1 1 2 2 2 3 3]
The actual array is attached here. How may I code for this? Thanks so much!

Best Answer

The simple and efficient MATLAB solution:
X = [5,5,6,6,6,11,11];
[~,~,Z] = unique(X,'stable')
Z = 7×1
     1
     1
     2
     2
     2
     3
     3

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