清空筛选条件
清空筛选条件

Covariance, a 2x2 matrix?

6 次查看（过去 30 天）
Sam
Sam 2015-6-12
评论： Sam 2015-6-13
Hello,
I calculated the covariance between two sets of data (2 columns of data). And I got a 2x2 covariance matrix (see picture). But what is the covariance now? I thought that it would be just 1 number?...
  2 个评论
Azzi Abdelmalek
Azzi Abdelmalek 2015-6-12
You don't need to post a picture, just paste your code
Sam
Sam 2015-6-13
Okay, sorry. But do you know the answer?

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

James Tursa
James Tursa 2015-6-12
编辑：James Tursa 2015-6-12
The nancov function assumes you have two variables because you have two columns of data, so it returns a 2x2 covariance matrix. The diagonal containing the variances of the variables and the off diagonals containing the covariances between the variables.

类别

在 Help Center 和 File Exchange 中查找有关 Logical 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