How do I select rows with particular step size?

2013 3 26
1 个回答
回答已采纳
7 次查看（30 天）

0 个投票

Hi, I have a 25000 X 5 matrix. I need to select rows to create new subset of matrices with particular order of rows for e.g. 1,21,41,..., 2,22,42,....., 3,23,43,...and 20,40,60...... I would appreciate your input and thank you in advance.

请先登录，再回答此问题。

 采纳的回答

Mahdi
Mahdi 2013-3-26

0 个投票

If A is the 25000 X 5 matrix, then you can just use:
A(1:20:end, :)
to get 1,21,41,... from all of the columns. If you want data from just the first column, use
A(1:20:end, 1)
Look at what the : operator does to help you.

更多回答（0 个）

类别

在 帮助中心 和 File Exchange 中查找有关 Resizing and Reshaping Matrices 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