Indexing (extracting value from rows)

1 次查看（过去 30 天）
dan berkowitz
dan berkowitz 2019-6-5
评论： dan berkowitz 2019-6-8
Hi,
I have a 5 x 5 array, A, and a 5 x 1 array, B = [2 3 1 4 3]'. How can I extract the element from each row of A as they occur in B. i.e., I want the 2nd value of row one of A, they 3rd value of row two of A, ..., and the 3rd value of row five of A.
Any help would be appreciated.
db

请先登录，再回答此问题。

采纳的回答

Matt J
Matt J 2019-6-5
idx=sub2ind(size(A), ones(size(B)), B);
A(idx)

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 2-D and 3-D Plots 的更多信息

标签

Community Treasure Hunt

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

Start Hunting!

Translated by