MATLAB Answers

vector of integers modification

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Michal Kvasnicka
Michal Kvasnicka on 18 Sep 2019
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Commented: Michal Kvasnicka on 18 Sep 2019
I have vector of positive integers which I need to modify into vector of consecutive integers with the same ordering.
Example:
rank = [4 1 2 2 4] -> rank_new = [3 1 2 2 3]

  3 Comments

madhan ravi
madhan ravi on 18 Sep 2019
Please don’t use variable as rank, MATLAB has inbuilt function named rank().
Guillaume
Guillaume on 18 Sep 2019
There are so many functions in matlab that it can be difficult not to shadow one. If you're not doing matrix algebra it doesn't really matter if you stomp on rank.
On the other hand, rank is not a particularly good variable name. rank of what? It would be much better if that what was added to the variable name.
Michal Kvasnicka
Michal Kvasnicka on 18 Sep 2019
Of course, you are right! I just use rank variable name by my mistake... :)

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Accepted Answer

Guillaume
Guillaume on 18 Sep 2019
Possibly:
rank = [4, 1, 2, 2, 4];
[~, ~, rank_new] = unique(rank)

  1 Comment

Michal Kvasnicka
Michal Kvasnicka on 18 Sep 2019
Simple and effective solution ... thanks

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