Yes, of course! Thank you. So, I guess the answer is that R itself can not be made to do so directly.
Many thanks for confirming this. Sincerely, Ranjan On Wed, 21 Feb 2007 20:23:55 +0000 (GMT) Prof Brian Ripley <[EMAIL PROTECTED]> wrote: > On Wed, 21 Feb 2007, Ranjan Maitra wrote: > > > I was wondering if it is possible to get the p-values for one-sided > > tests on the parameters of a linear regression. > > > > For instance, I use lm() and store the result in an object. lm() gives > > me a matrix, using summary() and coef() on which gives me a matrix > > containing the coefficients, the standard errors, the t-statistics and > > the two-sided p-values by default. Can I get it to provide me with > > one-sided p-values (something like alternative less than or greater > > than)? > > Not 'it', but you can easily do the calculation yourself from the output. > E.g. > > example(lm) > s <- summary(lm.D90) > pt(coef(s)[, 2], s$df[2], lower=FALSE) # or TRUE > > -- > Brian D. Ripley, [EMAIL PROTECTED] > Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ > University of Oxford, Tel: +44 1865 272861 (self) > 1 South Parks Road, +44 1865 272866 (PA) > Oxford OX1 3TG, UK Fax: +44 1865 272595 > ______________________________________________ [email protected] 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.
