Re: R-beta: vectors in dataframe?

Thomas Lumley (thomas@biostat.washington.edu)
Mon, 27 Apr 1998 11:54:29 -0700 (PDT)


Date: Mon, 27 Apr 1998 11:54:29 -0700 (PDT)
From: Thomas Lumley <thomas@biostat.washington.edu>
To: Bill Simpson <wsimpson@uwinnipeg.ca>
Subject: Re: R-beta: vectors in dataframe?
In-Reply-To: <Pine.OSF.3.95.980427132314.2109A-100000@io.uwinnipeg.ca>

On Mon, 27 Apr 1998, Bill Simpson wrote:

> I have a file:
> 
> x     y     z
> 0.025 0.025 1.65775
> 0.025 0.050 1.62602
> 0.025 0.075 1.63683
> 0.025 0.100 1.91847
> 0.025 0.125 2.00913
> 0.025 0.150 1.82222
> 0.025 0.175 1.70901
> 0.025 0.200 1.39759
> 0.025 0.225 1.39089
> 0.025 0.250 1.04762
> 
> If I read the file like this:
> data<-read.table("file.dat")
> 
> How do I access the vectors x,y,z that are inside the dataframe data?  I
> studied Venables and Ripley and could not figure it out.

	data$x 
	data$y 
	data$z  
or 
	data[,"x"]
	data[,"y"]
	data[,"z"]
or

	attach(data)
	x
	y
	z
	detach()

or in modelling functions
	lm(y~z+x,data=data)


Thomas Lumley
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