search for: phurd

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qqnorm(), is it "backwards"?
2000 Sep 21
2
qqnorm(), is it "backwards"?
...in _Biometry_ Sokal & Rohlf, 3rd ed). The same thing with skewed data, I expect right skewed data to show a negatively accelerating shape, but qqnorm() curves upwards. Am I missing something, or is qqnorm() consistently heading in the wrong diirection? Cheers, -P. -- Peter L. Hurd, Ph.D. phurd at uts.cc.utexas.edu http://www.zo.utexas.edu/research/phurd fax 512.471-3878 Section of Integrative Biology, University of Texas, Austin TX 78712 USA -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.a...
G-test : log-likelihood ratio test
2001 Sep 20
0
G-test : log-likelihood ratio test
...ked to find myself) on this list a few times. It has the same basic syntax as chisq.test(). It does both goodness of fit tests and tests of independence. Yates' and Williams' corrections are implemented. I've put some examples from Sokal & Rohlf up at http://www.psych.ualberta.ca/~phurd/cruft Feedback welcomed, -P. # Kludgy log-likelihood test of independence & goodness of fit # Does Williams' and Yates' correction # # G (TOI) calculation from Zar (2000) Biostatistical Analysis 4th ed. # G (GOF) calculation from Sokal & Rohlf (1995) Biometry 3rd ed. # q calculati...
Ancova in R?
2000 Feb 08
1
Ancova in R?
How to Ancova in R? I know this has got to be an FAQ, because I see it asked in the lists, but I haven't seen an answer to it. I see the R-sm has the ancova thing happening, but I kind of doubt that what I'm trying to do is "smoothing"... -- Pete Hurd phurd at uts.cc.utexas.edu http://www.zo.utexas.edu/research/phurd Section of Integrative Biology, University of Texas, Austin TX 78712 USA -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send &q...
factorial(), modulus()
2000 Jul 06
1
factorial(), modulus()
Dear R friends, I was wondering if there were factorial and modulus functions out there that I've somehow overlooked? -P. -- Peter L. Hurd, Ph.D. phurd at uts.cc.utexas.edu http://www.zo.utexas.edu/research/phurd fax 512.471-3878 Section of Integrative Biology, University of Texas, Austin TX 78712 USA -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.a...
R: one bananna aov() question
2000 Mar 31
1
R: one bananna aov() question
...-2.58811755072332 172 L24 16 0.536029478664361 173 L25 17 4.03648439632426 174 L27 18 -1.96351560367573 175 L28 19 2.03602947866436 176 L29 20 -0.963515603675735 > ----------------------------------------------- -- Pete Hurd phurd at uts.cc.utexas.edu http://www.zo.utexas.edu/research/phurd Section of Integrative Biology, University of Texas, Austin TX 78712 USA -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send &q...