Hi, It depends on the function used to calculate it---each has their own way of extracting particular values. Here's an example for t.test:
x <- rnorm(10, 100, .1); y <- x - 100 t.test(x, y)$p.value You could find this yourself by looking at the documentation for t.test() ?t.test The heading "Value" shows what the function returns (though not necessarily all printed). Typically, you can access any of those by $theirname. In this case you see p.value, so you can get the p-value by: t.test()$p.value. Equivalently (and more useful for reference) ## save the results of t.test() txy <- t.test(x, y) txy$p.value HTH, Josh On Mon, Dec 6, 2010 at 11:03 AM, kayj <kjaj...@yahoo.com> wrote: > > I was wondering if there is a way to get an exact p-value at times where R > gives me just a range . for example > t.test(x,y) > p-value < 2.2e-16 > > thanks, > > > -- > View this message in context: > http://r.789695.n4.nabble.com/getting-the-exact-p-value-tp3075107p3075107.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > 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. > -- Joshua Wiley Ph.D. Student, Health Psychology University of California, Los Angeles http://www.joshuawiley.com/ ______________________________________________ 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.
