[R] How to run Rcmdr in Mac Os X Tiger?

2009-05-17 Thread Jenny Tan (Dr J)
This question might been asked previously (I googled), but I can't find a workable solution in the archives. My question is: how to run Rcdmr in Mac Os X? The error message when I launched Rcmdr fresh from a R session is: Version of R: R 2.8.1 GUI 1.27 Tiger build 32-bit (5301) > library(Rcmdr)

[R] How to replicate probit regression analysis done by the priprobit software using R?

2008-09-17 Thread Jenny Tan
I wonder if anyone is familiar with the priprobit software (Sakuma M. 1998. Probit analysis of preference data. Appl Entomol Zool. 33:339–34). I would like to replicate the same analysis and output in R. Of note, I want to determine the analytical sensitivity, defined as 95% cut-off value. j