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Re: st: RE: Thanks - Truncating x-axis in kernel density graphs


From   Ramani Gunatilaka <Ramani.Gunatilaka@buseco.monash.edu.au>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: RE: Thanks - Truncating x-axis in kernel density graphs
Date   Thu, 27 Nov 2003 21:31:54 +0000

I posted my problem last night and went off to bed, and this morning I have three responses. Being down under has its advantages! 
Many thanks to Sam, Nick and Philippe for their suggestions. I will work on them now.
Thanks once again,
Ramani

philippe.vankerm@ceps.lu wrote:
> An alternative to working in log and back-transform the density might
> here
> be to use an adaptive kernel density estimate (-findit akdensity- for 
> files and material).
> 
> The following lines should get you near what you want:
> 
> * 1/ get -akdensity-
> net from  http://www.stata-journal.com/software/sj3-2/
> net install st0037
> * 2/ estimate the density and save the coordinates
> akdensity XXX , nograph gen(x fx)
> * plot in the range you want
> tw line fx x if x<ZZZ
> 
> Hope this helps,
> 
> Philippe
> 
> 
> <<<<<<<<<<<>>>>>>>>>><<<<<<<<<>>>>>>>>>>
> Philippe Van Kerm
>  CEPS/INSTEAD
>  BP48, L-4501 Differdange
>  G.-D. Luxembourg
>  philippe.vankerm@ceps.lu
> <<<<<<<<<<<>>>>>>>>>><<<<<<<<<>>>>>>>>>>
> 
> >>>>>>>>
> 
> st: RE: Truncating x-axis in kernel density graphs
> 
> 
> Ramani Gunatilaka
> 
> > I am plotting kernel density functions of per capita 
> > household consumption for three years on the same graph.
> > All three distributions are skewed to the left and have 
> > very long tails extending to the right.
> > I would like to truncate the x axis at a certain 
> > consumption value so that the long tail is dropped and the 
> > area where all the action is, stretched across so that the 
> > changes are more visible.
> > I have explored the graph scale options and Stata list 
> > archives but couldn't find anything that related to my 
> > particular problem. 
> > If I were to specify a shorter range of consumption values 
> > than the entire data set, wouldn't it distort results?
> > Would anyone be able to advise of any alternative?
> 
> 
> 
> 
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