Re: [R] Simple R Question...

From: Patrick Burns <pburns_at_pburns.seanet.com>
Date: Sat, 21 May 2011 13:54:57 +0100

Are you looking for:

dd[, "a", drop=FALSE]

On 21/05/2011 12:37, Lars Bishop wrote:
> Let's say I have the data frame 'dd' below. I'd like to select one
> column from this data frame (say 'a') and keep its name in the
> resulting data frame. That can be done as in #2. However, what if I
> want to make my selection based on a vector of names (and again keep
> those names in the resulting data frame). My attempt is #4 but doesn't
> work.
>
> dd<- data.frame(a = gl(3,4), b = gl(4,1,12), c=rnorm(12)) #1
> data.frame("a" = dd[,"a"]) #2
>
> mynames<- "a" #3
> data.frame(eval(mynames) = dd[, mynames]) #4
>
> thanks,
> Lars.
>
> ______________________________________________
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>

-- 
Patrick Burns
pburns_at_pburns.seanet.com
twitter: @portfolioprobe
http://www.portfolioprobe.com/blog
http://www.burns-stat.com
(home of 'Some hints for the R beginner'
and 'The R Inferno')

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Received on Sat 21 May 2011 - 12:58:09 GMT

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