MATLAB: Parameters Negative Binomial Distribution

MATLABstatistics

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.

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

If you have the Statsitics and Machine Learning Toolbox, see if the binofit (link) function will do what you want.

By using

 >> whos

I was able to determine that x's class is a "prob.ToolboxFittableParametricDistribution" object, such that

 for i=1:3
   isa(x(i),'prob.ToolboxFittableParametricDistribution')
 end

returns true for all three x's.