清空筛选条件
清空筛选条件

Matrix consisting of sub-elements of another matrix

1 次查看（过去 30 天）
Articat
Articat 2020-2-18
评论： Articat 2020-2-18
Say I have the following matrix:
x = [ 1 2 3 4 5 6 7 8 9]
If I want a matrix that consists of the following:
y = [1 2 4 5 9]
How would I go about doing this?

请先登录，再回答此问题。

采纳的回答

Matt J
Matt J 2020-2-18
编辑：Matt J 2020-2-18
By indexing,e.g.,
>> x = [ 1 2 3 4 5 6 7 8 9]*10;
>> y=x([1,2,4,5,9])
y =
10 20 40 50 90
  3 个评论
显示 1更早的评论
Matt J
Matt J 2020-2-18
There are lots of indexing techniques described at the link I gave you. For example, you can get every 3rd element with this syntax,
x=rand(1,137);
y=x(1:3:end);
You can also get all elements satisfying some condition with logical indexing, e.g.,
y=x(x>0.5);
Articat
Articat 2020-2-18
Checked out the link, was very helpful! thanks for your time

请先登录，再进行评论。

更多回答（0 个）

类别

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!

Start Hunting!

Translated by