Dear All,

 

this is my first post to the R-help, so please don't be too strict.

 

My problem concerns a QQ-Plot:

 

I want to show how well  empirical samples match with a theoretical
distribution. The theoretical distribution has got several parameters, but I
made it to fit via ML.

 

Anyway, the theoretical function gives me the density for a given data point
x. As far as I'm aware, the qqplot (generic) function in R does only take
data samples as Input. 

 

How can I derive samples from the pdf? Am I right in the way I see the
problem?

 

Or 

 

How can I modify the qqplot function, (or rebuild for myself) to get it
going?

 

 

I'm sure, this is very likely just a misunderstanding problem from myself,
but anybody who can shed further light on this is very welcome.

 

 

Best regards

 

Arndt Zimmermann


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