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


From   Alfonso S <[email protected]>
To   "[email protected]" <[email protected]>
Subject   Re: st: How to plot cdf after corrected kernel density
Date   Thu, 3 Oct 2013 15:20:15 -0700 (PDT)

Hi,

I suggest you download the package akdensity (st0037_3). It does an adaptive kernel density and generates the cdf variable as well. Use the code below to check it out.

sysuse auto
akdensity mpg, g(a b) cdf(cb)
line cb a

Let me know if that is what you were looking for.

Alfonso


----- Original Message -----
From: Nick Cox <[email protected]>
To: "[email protected]" <[email protected]>
Cc: 
Sent: Thursday, October 3, 2013 6:01 PM
Subject: Re: st: How to plot cdf after corrected kernel density

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
[email protected]


On 3 October 2013 21:45, Jain, Monica (HarvestPlus) <[email protected]> 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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