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Hi everyone, I'm studying the manual name: Analysis of Epidemiological Data Using R and Epicalc, maked by: Virasakdi Chongsuvivatwong and Edward McNeil. And I can't find the data base that they use in some examples, this are the names: Chapter7.Rdata,Chapter8.Rdata,Chapter9.Rdata Somebody can tell me how can I have this files? Thk! Jos? O__ ---- Jos? Bustos M. c/ /'_ --- Master Apllied Stat Program (*) \(*) -...

...23.25. (I attach this Pic) It's not the same answer. Using the follow command don't give the same answer. library(epicalc) power.for.2p(0.75, 0.50, 50, 45, alpha = 0.05) with this command the Power = 0.6402. But in the Book we find Power=0.72. ?what it's the correct answer?...?Zar or Chongsuvivatwong? Thank guys! O__ ---- Jos? Bustos M. c/ /'_ --- Master Apllied Stat Program (*) \(*) -- University of Concepci?n, Chile

Dear R-friends, ? I am using the epicalc package and the manual by V. Chongsuvivatwong "Analysis of epidemiological data using R and Epicalc" to get the hang of some basic epidemiological analyses.??? ? After running all the analyses of chapter 7, one is supposed to wrap it up by saving the data writing: ? ? > save(.data, file = "Chapter7.Rdata") ? ...?after w...

...as suggested in the posting guide. Regards, Cliff ---------- Forwarded message ---------- From: Clifford Long <gnolffilc at gmail.com> Date: Sun, Jul 26, 2009 at 8:46 PM Subject: Fwd: ROC curve using epicalc (after logistic regression) To: cvirasak at medicine.psu.ac.th Dear Virasakdi Chongsuvivatwong, After sending the message below to the R-help mailing list, it occurred to me that I probably should also have sent a copy to you, per R posting guidance. I would be interested in any thoughts or suggestions that you might have regarding my difficulty using the ROCR routine in the epicalc packag...