Replace vector duplicates with unique numbers

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Giovanni Rosso
Giovanni Rosso 2015-7-8
评论： Giovanni Rosso 2015-7-8
I have a D-dimension vector and I want to obtain a vector where duplicates are replaced by random numbers in [1,D]. The final vector must have all different values from 1 to D preserving non-duplicates order.
For example take D=6:
[2,4,5,4,1,2]
Isolate the unique numbers:
[2,4,5,-,1,-]
Then put the remaining 3 and 6 values:
[2,4,5,6,1,3] or [2,4,5,3,1,6]
What's an efficient way to do it?

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James Tursa
James Tursa 2015-7-8
编辑：James Tursa 2015-7-8
One way:
D = [2,4,5,4,1,2]
n = numel(D)
C = setxor(D,1:n)
[U id] = unique(D)
ix = setxor(id,1:n)
D(ix) = C(randperm(numel(ix)))
D =
2 4 5 4 1 2
n =
6
C =
3 6
U =
1 2 4 5
id =
5
1
2
3
ix =
4
6
D =
2 4 5 6 1 3

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