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Find all unique values and replace it with new values

조회 수: 5 (최근 30일)
Elysi Cochin
Elysi Cochin 2022년 6월 6일
댓글: Image Analyst 2022년 6월 7일
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];

채택된 답변

Walter Roberson
Walter Roberson 2022년 6월 6일
findgroups()
But since you are using floating point numbers you really should use the third output of uniquetol() instead
  댓글 수: 4
Elysi Cochin
Elysi Cochin 2022년 6월 7일
okay sir will consider that

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추가 답변 (2개)

KSSV
KSSV 2022년 6월 6일
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 2022년 6월 6일
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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