Message-ID: <200103151055.FAA19621@cattell.psych.upenn.edu>
Date: 2001-03-15T10:55:07Z
From: Jonathan Baron
Subject: Alternative to list()
>Suppose I have a dataset with 10 columns, let's call it "foo".
>
>Now if I want to extract out only column 2 ~ 8, then I know I can use =
>either:
> foo[ ,2:8]
>or
> fooNew <- list( foo[ ,2:8] )
>
>(Is there any other alternative, just out of curiosity?)
>
>But, if I only want, say, column 1, 4 and 7, I tried:
> fooNew <- list( x =3D foo[ ,1], y =3D foo[ ,4], z =3D foo[ , 7] )
>then when I type=20
> fooNew
>I got a list of:
> $x
> ....
> ....
> $y
> ....
> ....
> $z
> ....
> ....
>
>However what I really want is for them to be in vector/column form. How =
>would I do this?
foo[,c(1,4,7)]
JOn
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