Hi David, Since I am looking at very extreme values, it appears I will need FMLIB. Is it an R lib? if so which version? How/where can I download it?
Regards. ----- Original Message ----- From: David Duffy <[EMAIL PROTECTED]> Date: Wednesday, July 13, 2005 9:46 am Subject: [R] exact values for p-values > > This is obtained from F =39540 with df1 = 1, df2 = 7025. > > Suppose am interested in exact value such as > > > > If it were really necessary, you would have to move to multiple > precision. The gmp R package doesn't seem to yet cover this, but > FMLIB(TOMS814, DM Smith) is a multiple precision f90 library that does > include the incomplete beta -- it allows one to say for > F(1,7025)=39540,P=6.31E-2886 (evaluated using 200 sign. digit > arithmetic). Results from > R's pf() agree quite closely with the FMLIB results for less > extreme values > eg > > print(pf(1500,1,7025,lower=FALSE), digits=20) > [1] 1.3702710894887480597e-297 > > cf 1.37027108948832580215549799419452388134616261215463681945E-297 > > > | David Duffy (MBBS PhD) ,- _|\ > | email: [EMAIL PROTECTED] ph: INT+61+7+3362-0217 fax: -0101 / > * > | Epidemiology Unit, Queensland Institute of Medical Research > \_,-._/ > | 300 Herston Rd, Brisbane, Queensland 4029, Australia GPG > 4D0B994A v > > ______________________________________________ > R-help@stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting- > guide.html ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
