Message-ID: <f21f775b0803190915p3def1820lb557e248ad16e4d8@mail.gmail.com>
Date: 2008-03-19T16:15:32Z
From: David Barron
Subject: Using "subset" in correlation analysis
In-Reply-To: <47E10E1D.6020100@gmail.com>
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
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David Barron
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