If you believe P-values that small have any meaning at all, I have a bridge to sell you...
Bert Gunter Genentech Nonclinical Statistics -----Original Message----- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of Will Eagle Sent: Wednesday, May 19, 2010 1:53 AM To: r-help@r-project.org Subject: [R] p-values < 2.2e-16 not reported Dear all, how can I get the exact p-value of a statistical test like cor.test() if the p-value is below the default machine epsilon value of .Machine$double.eps = 2.220446e-16? At the moment smaller p-values are reported as "p-value < 2.2e-16". .Machine$double.eps <- 1E-100 does not solve this issue, although this value should be used by the format.pval() function. To know the exact p-values down to 1E-200 is very important since I have multiple tests which require a alpha error-threshold below 2.2E-16. Thanks in advance, Will ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
