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

[Alfonso S <oneiros_spain@yahoo.com>]

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 <njcoxstata@gmail.com>
To: "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
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
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
>
>
>
> *
> *   For searches and help try:
> *   http://www.stata.com/help.cgi?search
> *   http://www.stata.com/support/faqs/resources/statalist-faq/
> *   http://www.ats.ucla.edu/stat/stata/

*
*   For searches and help try:
*  http://www.stata.com/help.cgi?search
*  http://www.stata.com/support/faqs/resources/statalist-faq/
*  http://www.ats.ucla.edu/stat/stata/


*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/faqs/resources/statalist-faq/
*   http://www.ats.ucla.edu/stat/stata/