Ranked Set Sampling
On Oct 3, 2010, at 2:13 PM, Jeffrey Spies wrote:
This is certainly not my area of expertise, but like Peter mentioned, Jeff Terpstra published this: http://www.jstatsoft.org/v14/i07 which has R code listed as supplements. Joe McKean seems to keep an updated version of that code here: http://www.stat.wmich.edu/red5328/WWest/ And Brent Johnson has extended that code for variable selection/ regression: http://userwww.service.emory.edu/~bajohn3/software.html Maybe that's a start; if you find more by following Peter's suggestion of privately contacting authors, please follow-up with the list.
Yes; search terms ' "ranked set sampling" "r-project" ' ... does produce a very complete book-length piece: "Robust Nonparametric Statistical Methods" (2010) by Hettmansperger and McKean which has a section on the question posed at printed pg 53 (pg 64 of the pdf version) and on second print page cites R code available: http://www.stat.wmich.edu/mckean/Rfuncs/ (And I note that Terpstra and McKean are co-authors and that the same institution.)
Cheers, Jeff. On Sun, Oct 3, 2010 at 1:38 PM, Peter Dalgaard <pdalgd at gmail.com> wrote:
On 10/03/2010 06:32 PM, David Winsemius wrote:
Ahmed Albatineh wrote:
Are you aware of any package that calculates Ranked Set Sample? If you have a code that you are willing to share, I will acknowledge that in my work. Thanks much Ahmed
I wonder if this is a phrase that is uniformly understood? One possibility is that you are asking to sample elements of a set based on some ranking function. In that case you may need to describe in more detail how you want to handle ties and whether this function is supposed to deal with multivariate strata. (There are many base functions that handle univariate situations and there are packages that provide support for more complex ones.) You are also requested (in the Posting Guide) to provide an example that can be cut and pasted and desired results against which responder can judge the degree to which their efforts agree with your hopes.
It's a fairly well-defined concept. I.e., you can google for it... On the other hand, same search points to authors like Jeff Terpstra who explicitly says that he codes in R, so maybe ask him instead of the the world at large? -- Peter Dalgaard Center for Statistics, Copenhagen Business School Phone: (+45)38153501 Email: pd.mes at cbs.dk Priv: PDalgd at gmail.com
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David Winsemius, MD West Hartford, CT