Statalist


[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

st: How do I bootstrap confidence intervals from the gam procedure?


From   Bradley Fedy <[email protected]>
To   [email protected]
Subject   st: How do I bootstrap confidence intervals from the gam procedure?
Date   Tue, 12 Aug 2008 10:46:02 -0600

Dear Statalisters, 

I am using the -gam- procedure (Royston and Ambler) to look at trend data. 
 My response variable is zero inflated count data.  The data are 
longitudinal with multiple observations on a site over time.  The data 
are: 

          tsset site year

In its simplest formation the model statement is: 

         gam count year site, family (poisson) link(log) df(10)

Question 1.
I would like to bootrap confidence intervals from the gam procedure.  Does 
anyone know how to do this, given the longitudinal nature of the data? 


Question 2. 
Also, -gamplot- simply plots the smooth function produced by the model.  I 
would like to plot the 'smoothed' counts on the original scale.  Does 
anyone have suggestions as to how I might do that?

Thank you very much for your time.

Brad
*
*   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 1996–2024 StataCorp LLC   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index