Find Vector of Index Without Using Loop

1 次查看（过去 30 天）
czeslaw
czeslaw 2018-4-27
回答： Akira Agata 2018-4-27
Hi all,
If I have
a=[2 3 4 5]
b=[3 5]
%what I want is the index of same elements between a and b, which gives:
i=[2 4]
I want to do this without having to use any loop, because the data is hundreds of thousands elements. Using find() will require me to use loop I think.
Please help. Thanks.

请先登录，再回答此问题。

采纳的回答

Akira Agata
Akira Agata 2018-4-27
Please try ismember function, like:
[~,idx] = ismember(b,a);

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Matrices and Arrays 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