Recoding unique numbers to another number

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!

Answer 1

[Stephen23]

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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Answer 2

[KALYAN ACHARJYA]

data=[5 5 6 6 6 11 11];
counts=histc(data,unique(data));
data_result=repelem(1:length(unique(data)),counts)

Results:

data_result =

     1     1     2     2     2     3     3

Answer 3

[Walter Roberson]

findgroups(data)