[R] data frame question
John Kane
jrkrideau at yahoo.ca
Fri Feb 15 00:09:40 CET 2008
Create the new data.frame and do the muliplying on it?
df2 <- df1
df2[,1] <- df2[,1]*2
--- 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
>
>
>
>
>
>
>
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