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st: RE: RE: Plots : Gamma density

From   "Naji Nassar (MIReS)" <>
To   <>
Subject   st: RE: RE: Plots : Gamma density
Date   Tue, 22 Jun 2004 11:07:55 +0200

Thanks Nick for the axis scales..
It worked perfectly

-----Message d'origine-----
De :
[]De la part de Nick Cox
Envoyé : mardi 22 juin 2004 10:58
À :
Objet : st: RE: Plots : Gamma density

-gammafit- and -pgamma- are user-written 
commands for two-parameter gamma distributions
from SSC. 

You don't say what p1 is here, perhaps
a typo for x1. 

However, don't use the -fraction- option. The 
defaulty -density- option for -histogram- 
gives the natural scale for comparing with 
a superimposed density function. 


Naji Nassar
> I want to plot an histogram with gamma density
> pgamma is showing perfect fit..
> but
> gammafit(var1)
> generate x1=gammaden(e(alpha),e(beta),0,var1)
> twoway (histogram var1,fraction) (scatter p1 var1)
>  doesn't fit as expected..

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