Thank you for the response. The suggestions are helpful. I would look into
the capabilities of the boot function. The solution in 8.3 is the last
resort that I was trying to avoid. Regards,
Ashraf
-Original Message-
From: Berton Gunter [mailto:[EMAIL PROTECTED]
Sent: Friday, December 17, 2004 5:54 PM
To: 'Mohammad A. Chaudhary'; [EMAIL PROTECTED]
Subject: RE: [R] Confidence Intervals from Bootstrap Replications
See , e.g. section 8.3 The two-sample problem of Efron and Tibshirani's AN
INTRODUCTION TO THE BOOTSTRAP. It makes it clear there why one just
bootstrap samples independently from the two separate samples.
The strata argument of boot() in the boot package allows one to do such
independent sampling and use the capabilities of that function.
-- Bert Gunter
Genentech Non-Clinical Statistics
South San Francisco, CA
The business of the statistician is to catalyze the scientific learning
process. - George E. P. Box
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
Mohammad A. Chaudhary
Sent: Friday, December 17, 2004 2:39 PM
To: [EMAIL PROTECTED]
Subject: [R] Confidence Intervals from Bootstrap Replications
Hi All:
I have to compute bootstrap confidence intervals, the statistic
(incremental cost effectiveness ratio) is computed from two samples
(intervention and control) of different sizes. All the bootstrap
functions that I have seen use one dataset as argument. I may go ahead
and get the desired number of bootstrap replications
separately. I would
appreciate if you could point me to a source of a bootstrap
function (if
available) that takes the B bootstrap replications and other
descriptive
statistics and can get me the confidence intervals. Please
write me if I
have not been clear in explaining my problem. Regards,
Ashraf
___
M. Ashraf Chaudhary, Ph.D.
Associate Scientist/Biostatistician
Department of International Health
Disease Prevention and Control Program
Johns Hopkins University Bloomberg School of Public Health
615 North Wolfe Street, Room W5506
Baltimore MD 21205
[EMAIL PROTECTED]
Phone: (410) 502-0741/Fax: (410) 502-6733
http://faculty.jhsph.edu/?F=MohammadL=Chaudhary
[[alternative HTML version deleted]]
__
[EMAIL PROTECTED] mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide!
http://www.R-project.org/posting-guide.html
__
[EMAIL PROTECTED] mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
