[R] About error in the panel

[lily li]

Thanks for your reply. I thought anything about R questions can be posted
here.

About your third point, what does it mean? I did the same thing before for
other scripts, but this one does not work. Thanks again.

On Sat, Mar 11, 2017 at 12:12 PM, Bert Gunter <bgunter.4567 at gmail.com>
wrote:

> 1. Not reproducible, hence impossible to say.
>
> 2. This is r-help. RStudio is totally separate and its own support page.
>
> 3. A guess: Use are sourcing the entire script in the editor panel
> into R, and there is something screwed up there.
>
> Cheers,
> Bert
>
>
> Bert Gunter
>
> "The trouble with having an open mind is that people keep coming along
> and sticking things into it."
> -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )
>
>
> On Sat, Mar 11, 2017 at 10:50 AM, lily li <chocold12 at gmail.com> wrote:
> > Hi R users,
> >
> > I have a problem about using R studio. For example, there is a dataframe
> > that has many columns. I want to aggregated column X and column Y into
> > column Z. Column Z does not exist before the aggregation. I use the code
> > below:
> > df$Z = df$X + df$Y
> >
> > However, it does not work in the top left panel in Rstudio, and has the
> > following warning message:
> > Error in `$<-.data.frame`(`*tmp*`, "Z", value = numeric(0)) :
> >   replacement has 0 rows, data has 34333
> >
> > If I type the same code in the Console panel (bottom left panel), it
> works.
> > How to deal with this problem? Thanks.
> >
> >         [[alternative HTML version deleted]]
> >
> > ______________________________________________
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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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