Statalist The Stata Listserver


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

st: bootstrapping and glm


From   Jennifer Devine <jdevine@mun.ca>
To   statalist@hsphsun2.harvard.edu
Subject   st: bootstrapping and glm
Date   Tue, 18 Apr 2006 13:17:07 -0230

I have data that is autocorrelated because it is acoustic data from transects. I'm interested in
running a glm:

glm biomass year season tod

where season is 1 or 2 (Jan or June) and tod is time of day (1=day, 2=night, 3=dusk). At the moment,
everything is significant but that may be becuase of the autocorrelation. To deal with the
autocorrelation, I want to randomly resample the data and then run the glm to test for year,
seaoson and time of day effects. If I have season or time of day effects, I then need to break the
data down further. I'm getting nowhere using the stata maunal or help files for bootstrap and
bsample.

I run this:

bs  sum_abc, strata(year season tod) saving(mybs2): glm sum_abc year season tod, f(gaussian)
link(id)

and the result is not what I want. Do I need to bsample after breaking it into smaller subsets by
year, season and time of day and then append the files? If I try to bsample the data with strata,
cluster or both, I can't get a large enough sample size while retaining the 3 X.

Thank you.
Jennifer



><>><>><>><>><>><>><>><>><>><>><>><>><>><>><>><>><>><>
Jennifer Devine
Doctoral Candidate

Memorial University
4 Clark Place
St. John's NL
Canada
A1C 5S7
Tel:  709-737-8833
Fax: 709-737-3121

jdevine@mun.ca

><>><>><>><>><>><>><>><>><>><>><>><>><>><>><>><>><>><>

*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   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   |   What's new   |   Site index