Re: [R] Is it the PPS samples i needed in R?

From: Thomas Lumley <tlumley_at_u.washington.edu>
Date: Tue 16 Jan 2007 - 18:57:13 GMT

On Fri, 12 Jan 2007, zhijie zhang wrote:

> Dear friends,
> I want to do a unequal probability sampling, that is, Probability
> Proportionate to size, Is it right for the following programs?
> Say my original dataset is:
>
> ID Population
> 1 100
> 2 200
> 3 300
> IF the population is large ,then the corresponding ID has the large
> Probability to be selected.
>
> sample(A$ID, size=2, replace = FALSE, prob = A$population)
> #suppose the dataset name is A.
> Is it the PPS samples i needed ?

No, this does not give PPS samples for size>1. The "pps" and "sampling" packages have code for PPS samples.

         -thomas



R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Received on Wed Jan 17 06:01:38 2007

Archive maintained by Robert King, hosted by the discipline of statistics at the University of Newcastle, Australia.
Archive generated by hypermail 2.1.8, at Tue 16 Jan 2007 - 20:30:32 GMT.

Mailing list information is available at https://stat.ethz.ch/mailman/listinfo/r-help. Please read the posting guide before posting to the list.