Try this:
> cbind(scores[,1,drop = FALSE], scores[,2:3])
name round1 round2
1 Bob 40 5
2 Ron 30 6
3 Bud 20 4
>
Then do ?'[' to learn about 'drop'
On Tue, Nov 8, 2011 at 1:06 PM, Eric Rupley <erup...@umich.edu> wrote:
>
>
>
> Hi all ---
>
> I note that the column name of the first column in a dataframe does not
> necessarily get passed on when using cbind (example below)…
>
> I'm looking for help in clarifying why this behavior occurs, and how I can
> get all col names, including the first, passed on to the result…while I
> suspect it's obvious and documented to the cognoscenti, it's puzzling me…
>
> Many thanks for any help on this...
> Eric
>
>> scores <-
>> data.frame(name=c("Bob","Ron","Bud"),round1=c(40,30,20),round2=c(5,6,4))
>> #some toy data
>>
>> scores
> name round1 round2
> 1 Bob 40 5
> 2 Ron 30 6
> 3 Bud 20 4
>>
>
>> cbind(scores[,1],total=rowSums(scores[,2:3]),scores[,2:3])
> scores[, 1] total round1 round2
> 1 Bob 45 40 5
> 2 Ron 36 30 6
> 3 Bud 24 20 4
>>
>
> ...first column renamed...
>
> …yet this passes all column names:
>
>> cbind(scores[,1:3])
> name round1 round2
> 1 Bob 40 5
> 2 Ron 30 6
> 3 Bud 20 4
>>
>
> …but this doesn't:
>
>> cbind(scores[,1],scores[,2:3])
> scores[, 1] round1 round2
> 1 Bob 40 5
> 2 Ron 30 6
> 3 Bud 20 4
>
>
> --
> Eric Rupley
> University of Michigan, Museum of Anthropology
> 1109 Geddes Ave, Rm. 4013
> Ann Arbor, MI 48109-1079
>
> erup...@umich.edu
> +1.734.276.8572
> ______________________________________________
> R-help@r-project.org mailing list
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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.
>
--
Jim Holtman
Data Munger Guru
What is the problem that you are trying to solve?
Tell me what you want to do, not how you want to do it.
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