Bookmark and Share

Notice: On March 31, it was announced that Statalist is moving from an email list to a forum. The old list will shut down at the end of May, and its replacement, statalist.org is already up and running.


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: st: Calculation of cubic splines


From   Maarten Buis <maartenlbuis@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Calculation of cubic splines
Date   Thu, 19 May 2011 16:29:39 +0200

On Thu, May 19, 2011 at 4:21 PM, Mikkel Brabrand <mikkel@brabrand.net> wrote:
> But is predict not a post estimation command? How can I then use the same weights? Sorry if this is a stupid question but I have spend a frustrating looooong time on this!

You estimate your model on your original dataset, than you open your
new dataset, create the splines, and predict. -predict- does not know
or care whether you use the same data that where used for estimating
the model. I make this sound as an convenient error in Stata, but it
is actually a feature. (Or it was an error that turned out to be so
useful that someone at StataCorp decided that "yeah, we meant to do
that". We'll never know...)

-- Maarten

--------------------------
Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen
Germany


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


© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   Site index