[R] About error in the panel

Bert Gunter bgunter.4567 at gmail.com
Sat Mar 11 20:12:03 CET 2017

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.


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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