Sortperm issue?

General Usage
1

I work with Julia 1.5.1 on Linux. I have this array

x = [0.3575631591952295;
        -1.2891687824408367;
        -0.5123400980902758;
        -1.61271953171407;
         1.0854706981323956;
         0.2748568949784879;
         1.6127195317140701;
         0.021835136639906272;
         0.27038905630106824;
        -0.20860606471597504]

When I do sortperm I expect to get

8
2
3
1
9
7
10
5
6
4

but I get

sortperm(x)
10-element Array{Int64,1}:
  4
  2
  3
 10
  8
  9
  6
  1
  5
  7

which makes no sense.

Note however that sort() do work correctly

sort(x)
10-element Array{Float64,1}:
 -1.61271953171407
 -1.2891687824408367
 -0.5123400980902758
 -0.20860606471597504
  0.021835136639906272
  0.27038905630106824
  0.2748568949784879
  0.3575631591952295
  1.0854706981323956
  1.6127195317140701

and on some other examples sortperm work.

Am I doing something wrong? Is there something I don’t see? Can someone reproduce that error ?

2

It seems correct to me:

julia> x = [0.3575631591952295;
               -1.2891687824408367;
               -0.5123400980902758;
               -1.61271953171407;
                1.0854706981323956;
                0.2748568949784879;
                1.6127195317140701;
                0.021835136639906272;
                0.27038905630106824;
               -0.20860606471597504];

julia> ind = sortperm(x)
10-element Array{Int64,1}:
  4
  2
  3
 10
  8
  9
  6
  1
  5
  7

julia> x[ind]
10-element Array{Float64,1}:
 -1.61271953171407
 -1.2891687824408367
 -0.5123400980902758
 -0.20860606471597504
  0.021835136639906272
  0.27038905630106824
  0.2748568949784879
  0.3575631591952295
  1.0854706981323956
  1.6127195317140701

julia> x[ind] == sort(x)
true
3

My bad I got confused with the rank! Which would be

using Random
ordinalrank(x)
10-element Array{Int64,1}:
  8
  2
  3
  1
  9
  7
 10
  5
  6
  4