Re: [R] How to include an externally defined NULL value in lm

From: <markleeds_at_verizon.net>
Date: Mon, 03 Mar 2008 16:34:41 -0600 (CST)


>From: Matthieu Stigler <stigler3_at_etu.unige.ch>
>Date: 2008/03/03 Mon PM 04:07:09 CST
>To: r-help_at_r-project.org
>Subject: [R] How to include an externally defined NULL value in lm

maybe you should a<-0 unless there's special behavior of NULL that's unknownst to me ?

>Hello!
>
>I would love to be able to include an external variable to a lm call, I
>mean something:
>
>if(TRUE)
> a<-freeny.x[,4]
>else
> a<-NULL
>
>lm(freeny.y~freeny.x[,-4] +a)
>
>but it does not work with a<-NULL, whereas
>
>lm(freeny.y~freeny.x[,-4] +NULL)
>
>I don't understand why and did not find an answer in the manuals... do
>you see it? Any idea?
>
>Thanks!!
>
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>PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>and provide commented, minimal, self-contained, reproducible code.



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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. Received on Mon 03 Mar 2008 - 22:38:23 GMT

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