Re: [R] data frame question

From: John Kane <jrkrideau_at_yahoo.ca>
Date: Thu, 14 Feb 2008 18:09:40 -0500 (EST)


Create the new data.frame and do the muliplying on it?

df2 <- df1
df2[,1] <- df2[,1]*2

>
>
> 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
>
>
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>
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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 - 23:13:13 GMT

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