Message-ID: <A27562CE-EB01-4FD5-A531-6FCC97106DE2@mac.com>
Date: 2012-11-23T08:16:02Z
From: Brian Feeny
Subject: What is the . in formula ~. syntax?
In-Reply-To: <6650C80F-956E-4F6C-9AD3-3515CB39E3C4@gmail.com>
Thank you! I searched in the manual, but I did not see where this is mentioned, I looked under operators
and in some of the formula documentation.
Brian
On Nov 23, 2012, at 3:15 AM, Michael Weylandt <michael.weylandt at gmail.com> wrote:
>
>
> On Nov 23, 2012, at 4:26 AM, Brian Feeny <bfeeny at mac.com> wrote:
>
>> I know if I have a dataframe with columns y, x1, x2 and I wish to have y as my y value and x1 and x2 as x values I can do:
>> y ~ x1 + x2
>>
>> or
>>
>> y ~.
>>
>> but can someone explain what . actually is or what its transposed into?
>
> Everything not already stated.
>
> rmw
>
>>
>> I searched for this with no success, reading the "formula" manual pages.
>>
>> Brian
>>
>> ______________________________________________
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>> 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.