Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
121 views
in Technique[技术] by (71.8m points)

python - Indexing numpy array with another numpy array

Suppose I have

a = array([[1, 2],
           [3, 4]])

and

b = array([1,1])

I'd like to use b in index a, that is to do a[b] and get 4 instead of [[3, 4], [3, 4]]

I can probably do

a[tuple(b)]

Is there a better way of doing it?

Thanks

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

According the NumPy tutorial, the correct way to do it is:

a[tuple(b)]

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

1.4m articles

1.4m replys

5 comments

56.9k users

...