Using "subset" in correlation analysis
You have to use the formula interface, so something like this: cor.test(~ Alt + Cab, data=adults, alternative="greater", subset=Sex=="male") David
On Wed, Mar 19, 2008 at 12:59 PM, James J. Roper <jjroper at gmail.com> wrote:
The correlation test function says that it can do a subset where one
specifies the subsete vector. I cannot seem to get it to work.
For example, the command line is:
cor.test(adults$Alt, adults$Cab, alternative="greater", method="pearson")
So, let?s say my subset vector is "Sex". How would I state the command
to get the test of that subset?
Thanks in advance.
Jim
--
James J. Roper, Ph.D.
James J. Roper
Ecologia, Evolu??o e Din?micas Populacionais
de Vertebrados Terrestres
------------------------------------------------------------------------
Caixa Postal 19034
81531-990 Curitiba, Paran?, Brasil
------------------------------------------------------------------------
E-mail: jjroper at gmail.com <mailto:jjroper at gmail.com>
Telefone: 55 41 33857249
celular: 55 41 99870543
------------------------------------------------------------------------
Ecologia e Conserva??o na UFPR <http://www.bio.ufpr.br/ecologia/>
Home Page <http://jjroper.googlespages.com>
Ars Artium Consulting <http://arsartium.googlespages.com>
______________________________________________ R-help at 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.
David Barron Said Business School Park End Street Oxford OX1 1HP 01865 288906