# Question about sort?

**URL:** https://discourse.julialang.org/t/question-about-sort/81475
**Category:** General Usage
**Created:** [May 22, 2022, 10:28pm UTC](https://discourse.julialang.org/t/question-about-sort/81475 "2022-05-22T22:28:59Z")
**Posts on this page:** 4
**Page:** 1

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### Author: ![Raymond](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/raymond/32/36557_2.png) [@Raymond](https://discourse.julialang.org/u/Raymond)
#### Post date: [May 22, 2022, 10:28pm UTC](https://discourse.julialang.org/t/question-about-sort/81475/1 "2022-05-22T22:28:59Z")

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Dear all,

how to get the index when using `sort` in Julia?

In Matlab ,we can get the index easily when using `sort`,

```julia
>> A = [7, 3, 6, 4];
>> [A, inds] = sort(A)

A =

     3 4 6 7

inds =

     2 4 3 1

```

In Julia, how to get the index?

```julia
julia> A = [7, 3, 6, 4];

julia> sort!(A)
4-element Vector{Int64}:
 3
 4
 6
 7

```

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### Author: ![jar1](https://avatars.discourse-cdn.com/v4/letter/j/c0e974/32.png) [@jar1](https://discourse.julialang.org/u/jar1)
#### Post date: [May 22, 2022, 10:47pm UTC](https://discourse.julialang.org/t/question-about-sort/81475/2 "2022-05-22T22:47:15Z")

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```julia
julia> sp = sortperm(A)
4-element Vector{Int64}:
 2
 4
 3
 1

julia> A[sp]
4-element Vector{Int64}:
 3
 4
 6
 7

```

---

<div class="post-metadata">

### Author: ![Oscar\_Smith](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/oscar_smith/32/25343_2.png) [@Oscar\_Smith](https://discourse.julialang.org/u/Oscar_Smith)
#### Post date: [May 22, 2022, 10:48pm UTC](https://discourse.julialang.org/t/question-about-sort/81475/3 "2022-05-22T22:48:42Z")

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Also, note that a lot of the time, if you want this, you really should be using a tree or priority queue or some more sophisticated data structure.

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<div class="post-metadata">

### Author: ![Raymond](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/raymond/32/36557_2.png) [@Raymond](https://discourse.julialang.org/u/Raymond)
#### Post date: [May 22, 2022, 11:03pm UTC](https://discourse.julialang.org/t/question-about-sort/81475/5 "2022-05-22T23:03:50Z")

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Thanks for your kind help.