Please take a look at the introduction to R too ...
> df <- read.delim(textConnection(Lines),sep="")
> df
A B C D
1 0.1 0.7 0.9 0.80
2 0.2 0.6 0.8 0.70
3 0.4 0.8 0.7 0.76
> d['A-B'] <- with(df, A-B)
Error in d["A-B"] <- with(df, A - B) : object 'd' not found
> d$v1 <- with(df, A-B)
Error in d$v1 <- with(df, A - B) : object 'd' not found
> d
Error: object 'd' not found
> df$v1 <- with(df, A-B)
> df
A B C D v1
1 0.1 0.7 0.9 0.80 -0.6
2 0.2 0.6 0.8 0.70 -0.4
3 0.4 0.8 0.7 0.76 -0.4
> df$v2 <- with(df, C-D)
> df
A B C D v1 v2
1 0.1 0.7 0.9 0.80 -0.6 0.10
2 0.2 0.6 0.8 0.70 -0.4 0.10
3 0.4 0.8 0.7 0.76 -0.4 -0.06
On Mon, Jan 31, 2011 at 7:02 AM, Ramya <ramya.vict...@gmail.com> wrote:
>
> Hi,
>
> I have a Dataframe.
>
> A B C D
> 0.1 0.7 0.9 0.8
> 0.20 0.60 0.80 0.70
> 0.40 0.80 0.70 0.76
>
> I need a resultant dataframe
>
> (A-B) (C-D)
> -0.6 0.1
> -0.40 0.1
> -0.40 -0.06
>
> Any suggestion would be of a great help
>
> Thanks
> Ramya
>
> --
> View this message in context:
> http://r.789695.n4.nabble.com/Finding-a-Diff-within-a-Dataframe-columns-tp3247943p3247943.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
> 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.
>
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