试用软件

Replace vector of idexes with values from another vector corresponding to those indexes

1 次查看（过去 30 天）

显示更早的评论

Nate Secinaro 2019-5-16

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/462546-replace-vector-of-idexes-with-values-from-another-vector-corresponding-to-those-indexes

回答： David Goodmanson 2019-5-17

采纳的回答： David Goodmanson

I have:

a = [1 1 2 2 2 3]
b = [9 8 7]

I need :

c = [9 9 8 8 8 7]

I can do this with a loop, but I am looking for a more effecint way. I have a vector that is 1x150000 that I need to do this for.

Thank you!

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

David Goodmanson 2019-5-17

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/462546-replace-vector-of-idexes-with-values-from-another-vector-corresponding-to-those-indexes#answer_375382

Hi Nate,

c = b(a) gets it done. a becomes an index vector into the elements of b.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

更多回答（0 个）

请先登录，再回答此问题。

类别

MATLAB Language Fundamentals Matrices and Arrays Matrix Indexing

在 Help Center 和 File Exchange 中查找有关 Matrix Indexing 的更多信息

标签

Community Treasure Hunt

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

Translated by

试用软件