Parameters Negative Binomial Distribution?

How can I calculate p and r of the Negative Binomial Distribution? I have a discrete data. I will appreciate someone can answer. Thank you.

Answer 1

[the cyclist]

If you have the Statistics Toolbox, use nbinfit ...

http://www.mathworks.com/help/stats/nbinfit.html

Answer 2

[Leslye]

I did it. I got the parameters. Thank you!!!

[the cyclist]

Glad to hear it. For future reference, it would have been better for you to post this as a comment on my answer, rather than its own answer.