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From | Nick Cox <njcoxstata@gmail.com> |
To | "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu> |
Subject | Re: st: Saving bootstrap samples |
Date | Sat, 15 Jun 2013 09:16:02 +0100 |
Apart from the word "saving", what you seek is unclear. Some precision on exactly what you seek would help: 1. Different bootstrap samples as each a separate dataset each a block of observations in a combined dataset each a block of variables in a combined dataset 2. Results of computations on each stored precisely how. Nick njcoxstata@gmail.com On 15 June 2013 08:39, Margaret MacDougall <Margaret.MacDougall@ed.ac.uk> wrote: > Thanks for your reply. It is the saving of the bootstrap samples I was > specifically asking about, but I would wish to save them in addition to the > output generated for particular parameters. Is it possible to combine these > two tasks? On 14/06/2013 14:40, Maarten Buis wrote: >> On Fri, Jun 14, 2013 at 3:31 PM, Margaret MacDougall wrote: >>> >>> I would value some tips on how best to go about saving bootstrap samples >>> generated by means of the bootstrap command in Stata. >> >> Do you want to save the samples or the statistics computed in each >> sample? The latter can easily be achieved using the -saving()- option. >> The former is harder. You'll probably have to abandon -bootstrap- and >> code the loop yourself and draw random observation in each iteration >> using -bsample-. It is probably most convient to store those samples >> as fweights, like so: >> >> forvalues i = 1/10 { >> qui gen w`i' = . >> bsample , weight(w`i') >> } >> * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/