Jerry Lewis wrote: > R implementations of Student's t, chi-squared, F, and beta distributions > all support noncentrality parameters. There is often a need (for example > in sample size problems) to invert the cdf to obtain the noncentrality > parameter given the quantile, instead of to obtain the quantile given the > noncentrality (as the q... functions do). For example, in SAS, these > functions are called TNONCT, CNONCT, and FNONCT. > > I believe that 2.7.0 was the current version when I submitted this on 27 > May, 2008. If it has been subsequently addressed, I can find no mention > of it either in the 2.7.2 Reference Manual or in today's > https://svn.r-project.org/R/trunk/NEWS
Thanks for the clarification. I was not aware you were citing an old bug report, because you had not cited anything in your message except for the old PR#. Uwe Ligges > Jerry > > Uwe Ligges <[EMAIL PROTECTED]> wrote >> [EMAIL PROTECTED] wrote: >>> Full_Name: Jerry W. Lewis >>> Version: 2.7.0 >>> OS: Windows XP Professional >>> Submission from: (NULL) (198.180.131.16) >>> >>> >>> If you are saying that there is no need to solve for the noncentrality >>> parameter, please justify this amazing assertion. >> - He? What noncentrality are you talking about? >> - You are reporting a bug with an outdated version of R. >> - You have not followed the guide on how to report bugs in R. >> >> Uwe Ligges >> >> >>> If you are saying that this need is already adequately addressed in R, > then >>> please enlighten me. ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
