
From  "Austin Nichols" <austinnichols@gmail.com> 
To  statalist@hsphsun2.harvard.edu 
Subject  Re: st: Sample command question 
Date  Tue, 31 Oct 2006 00:58:47 0500 
David McClintick You need not use sample to extract five observations, and you need not save each sample constructed without replacement as a separate dataset. set seed 123 forval x =1910/2000 { use `x', clear ds keep if !mi(`r(varlist)') forval i=1/10 { gen s`i'=uniform() sort s`i' gen sample`i'=(_n<=5) drop s`i' } egen rsum=rowtotal(sample*) keep if rsum>0 save sampled_`x' } On 10/31/06, David McClintick <mcclin47@msu.edu> wrote:
I apologize for not properly explaining what I intend to do. Hopefully this time I will clear up the confusion. I have 91 datasets, named 1910 to 2000 in increments of 1. Each dataset has 1 variable. What I wish to do, is use stata to take a 5 observation sample from each dataset, without replacement, and then do so 10 times so that I have 10 random samples of 5 observations from each complete dataset. Now, I realize that the way I have it set up, Stata would save the results in 910 different new datasets. This is where things become more difficult. If possible, I would like the results to be saved in a single dataset for each original dataset, storing each random sample as a different variable. So, instead of 910 new datasets, I would have 91 datasets with 10 variables in each dataset, and each variable containing 5 observations.
* * 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 1996–2016 StataCorp LP  Terms of use  Privacy  Contact us  What's new  Site index 