Covariance and Correlation matrix

[theakdad]

I would love to learn more about those two matrices. What do they tell us,how to calculate them? Maybe in R Studio?
I was searching for some good explanations on google,but i didnt find them.

And another question,i apologize if is not in right forum...
How do i know how much dispersion can i explain with Pearson coefficient?

Thank you for the answers.

 

[Wrichik Basu]

I was searching for some good explanations on google,but i didnt find them.

Fortunately, the internet has come a long way since 2014, and now we have a full Wikipedia article dedicated to this:
https://en.wikipedia.org/wiki/Covariance_and_correlation

Of course, now a Google search brings up plenty of hits.