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Re: st: lpoly predict residuals


From   Alex Olssen <alex.olssen@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: lpoly predict residuals
Date   Tue, 14 Jun 2011 08:42:56 +1200

I think the option generate may allow you to get residuals.

sysuse auto, clear
lpoly price weight, nograph at(weight) generate(fitted)
gen residuals = fitted - price

Is this what you want?

Kind regards,

Alex Olssen



On 14 June 2011 01:23, Maarten Buis <maartenlbuis@gmail.com> wrote:
> On Mon, Jun 13, 2011 at 3:12 PM, Stefan Pichler wrote:
>> I have trouble predicting the residuals after the lpoly command. I first run "lpoly y x" on my dataset and then use "predict" to get residuals. However, Stata returns "not sorted", which I don't understand.
>
> Whether or not -predict- is allowed after a command can be seen by
> looking at -help <command> postestimation- where <command> needs to be
> replaced by whatever command you want to look at. There is no such
> help file for -lpoly-. Another hint that this may be problematic is
> that -predict- is for use after estimation commands, which leave
> things behind in e(), while the helpfile for -lpoly- says it leaves
> things behind in r(). These two things suggest to me that you cannot
> use -predict- after -lpoly-.
>
> Hope this helps,
> Maarten
>
> --------------------------
> Maarten L. Buis
> Institut fuer Soziologie
> Universitaet Tuebingen
> Wilhelmstrasse 36
> 72074 Tuebingen
> Germany
>
>
> http://www.maartenbuis.nl
> --------------------------
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