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Re: st: How to plot cdf after corrected kernel density


From   Nick Cox <njcoxstata@gmail.com>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   Re: st: How to plot cdf after corrected kernel density
Date   Thu, 3 Oct 2013 23:01:59 +0100

The bottom line in the post you cite advises

"I prefer to get smoother cumulative distribution functions directly from
estimated quantiles."

I agree with that.
Nick
njcoxstata@gmail.com


On 3 October 2013 21:45, Jain, Monica (HarvestPlus) <M.Jain@cgiar.org> wrote:
> I am using -kdens- and I do not know how to plot the cumulative distribution function. I am using Stata 13 for Windows.
>
> I am using -kdens- to estimate kernel density correcting for bounded variables using linear combination method. I want to plot the cumulative distribution function for the estimated kernel densities. On one of the statlist threads (http://www.stata.com/statalist/archive/2005-04/msg00798.html), the following method has been suggested to plot them:
>
> sysuse auto
> _kdens mpg, g(b a)
> cumul b, g(cb)
> line cb b, sort
>
> With the above command, I get the densities on the x-axis, rather than the [x]. I looked all over the web to check if I can find how to do it, but I have not been successful. If I use the following command:
>
> line cb a, sort
>
> I get weird triangle shaped graph.
>
> Monica Jain
> Postdoctoral Fellow
> HarvestPlus, IFPRI
>
>
>
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