[EMAIL PROTECTED] wrote: > Dear R Developers: > > I have been playing with R, release 2.0.1 for a week now and have detected = > that all stat functions related to distribution probabilities have the same= > problem: > > 1.- The log.p parameter of all distribution functions, when set to TRUE, re= > turns a extrange value. > > Accoding to the manual, when set to true, it should return log(p) probabili= > ty. So to my understanding, setting to true this parameters is the same as = > getting the LOG of the same function with this parameter set to false. > > >>pt (1.1, 5, F, T) > > [1] 0.8392746 > >>pt (1.1, 5, T, T) > > [1] 0.5168608 > >>log(pt (1.1, 5, F, T)) > > [1] -0.1752173 > > 1.- The first line is the lower tail cumulative probability of a 1.1 on a S= > tudent T distribution with 5 degrees of freedom. > 2.- The second line is the lower tail cumulative probability of a 1.1 on a = > Student T distribution with 5 degrees of freedom on a log scale > 3.- The third line is the same as the second, but calculated mannually inst= > ead of using the log.p parameters > > Why line 2 and 3 do not return the same result?
Please NEVER submit bug reports twice, in particular not an unsensible one! One time ncp = 1, one time ncp = 0, so what's that surprising? Uwe Ligges > Reciba un cordial saludo, > =0D > Jos=E9 Luis Casado Mart=EDnez > ------------------------------------------------------------------ > European Computing Consultants > C/ Hermanos Garc=EDa Noblejas, N=BA 39, 5=AA, N 1 > 28037 Madrid > Telf.: 34-91-406 19 15. Fax: 34-91-406 19 16 > Movil: 34-607-750 316 > ------------------------------------------------------------------ > > > _____________________________________________________________________ > Mensaje analizado y protegido, tecnologia antivirus www.trendmicro.es > [[alternative HTML version deleted]] > > ______________________________________________ > [EMAIL PROTECTED] mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel ______________________________________________ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
