MATLAB Answers

How to get sorted index order for an array?

1,022 views (last 30 days)
Pablo
Pablo on 19 May 2015
Commented: Seraphin Kimaryo on 13 Oct 2020
For example, if I use the sort function on the array [14 8 91 19], I will get [8 14 19 91]. But instead I want [2 1 4 3] which gives me the indices of elements in the original array.
Is there any inbuilt function or does the sort function accept any additional argument to accomplish this? Otherwise I have to write my own function.

  0 Comments

Sign in to comment.

Answers (1)

Stephen Cobeldick
Stephen Cobeldick on 19 May 2015
Edited: Stephen Cobeldick on 19 May 2015
You can obtain the output indices directly from sort:
>> [out,idx] = sort([14 8 91 19])
out =
8 14 19 91
idx =
2 1 4 3
See the sort documentation for more useful information.

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!