Re: [R] data frame question

From: Henrique Dallazuanna <wwwhsd_at_gmail.com>
Date: Thu, 14 Feb 2008 15:19:32 -0200

If I understand:

df2 <- transform(df1, col3=col1*2)

On 14/02/2008, joseph <jdsandjd_at_yahoo.com> wrote:
>
>
> Hi
>
> I have a data frame df1 in which I would like to multiply col1
> by 2.
>
>
> The way I did it does not allow me to keep the old data
> frame.
>
>
> How can I do this and be able to create a new data frame
> df2?
>
>
> > df1= data.frame(col1= c(3, 5, NA, 1), col2= c(4, NA,6,
> 2))
>
>
> > df1
>
>
> col1 col2
>
>
> 1 3 4
>
>
> 2 5 NA
>
>
> 3 NA 6
>
>
> 4 1 2
>
>
> > df1$col1=df1$col1*2
>
>
> > df1
>
>
> col1 col2
>
>
> 1 6 4
>
>
> 2 10 NA
>
>
> 3 NA 6
>
>
> 4 2 2
>
>
>
>
>
> ____________________________________________________________________________________
> Be a better friend, newshound, and
>
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help_at_r-project.org mailing list
> 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.
>

-- 
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O

______________________________________________
R-help_at_r-project.org mailing list
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 Thu 14 Feb 2008 - 17:22:32 GMT

Archive maintained by Robert King, hosted by the discipline of statistics at the University of Newcastle, Australia.
Archive generated by hypermail 2.2.0, at Thu 14 Feb 2008 - 18:30:13 GMT.

Mailing list information is available at https://stat.ethz.ch/mailman/listinfo/r-help. Please read the posting guide before posting to the list.

list of date sections of archive