LoginSignup
2
2

Delete article

Deleted articles cannot be recovered.

Draft of this article would be also deleted.

Are you sure you want to delete this article?

More than 3 years have passed since last update.

@matsui-k20xx

Pythonでnumpyを使わずにargsortとかargmax

Posted at

Equivalent of Numpy.argsort() in basic python? - Stack Overflow
range()をソートするkeyで対象のリストをインデクシングするとできます。

argsort

x_list = [4, 1999, 2]
i_list = sorted(range(len(x_list)), key=x_list.__getitem__)
print(i_list) # [2, 0, 1]

argmax

x_list = [4, 1999, 2]
i_max = max(range(len(x_list)), key=x_list.__getitem__)
print(i_max ) # 1
2
2
0

Register as a new user and use Qiita more conveniently

  1. You get articles that match your needs
  2. You can efficiently read back useful information
  3. You can use dark theme
What you can do with signing up
Sign upLogin
2
2

Delete article

Deleted articles cannot be recovered.

Draft of this article would be also deleted.

Are you sure you want to delete this article?