Find all unique values and replace it with new values

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I have a vector with values
v = [0.23; 0.1; 0.33; 0.23 ; 0.33; 0.6; 0.6; 0.4];
I would like to find the unique values and replace the vector with numbers from 1, like
newV = [1; 2; 3; 1 ; 3; 4; 4; 5];

Accepted Answer

Walter Roberson
Walter Roberson on 6 Jun 2022
findgroups()
But since you are using floating point numbers you really should use the third output of uniquetol() instead
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More Answers (2)

KSSV
KSSV on 6 Jun 2022
v = [0.23; 0.1; 0.33; 0.23 ; 0.33; 0.6; 0.6; 0.4];
[c,ia,newV] = unique(v,'stable') ;
newV
newV = 8×1
1 2 3 1 3 4 4 5

Image Analyst
Image Analyst on 6 Jun 2022
Will this do:
v = [0.23; 0.1; 0.33; 0.23 ; 0.33; 0.6; 0.6; 0.4];
% newV = [1; 2; 3; 1 ; 3; 4; 4; 5];
[g, Tid] = findgroups(v)
g = 8×1
2 1 3 2 3 5 5 4
Tid = 5×1
0.1000 0.2300 0.3300 0.4000 0.6000
I know it doesn't match your desired but it's easy and maybe you don't need that exact order. If you need that exact order, can you explain why you need that order? (And don't jsut say I need it because I need it.)

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