[R-pkg-devel] Using ggplot2 within another package

Gábor Csárdi c@@rd|@g@bor @end|ng |rom gm@||@com
Thu Apr 22 23:58:00 CEST 2021

On Thu, Apr 22, 2021 at 11:19 PM Kevin R. Coombes
<kevin.r.coombes using gmail.com> wrote:
> Instead, the vignette says you should
>     importFrom("rlang", ".data")
> in your NAMESPACE, and write
>     ggplot(myData, aes(x = .data$myX, y = .data$myY))
> And now my dinosaur question: That looks like using one non-standard
> hack to cover up the problems with another non-standard hack. Why the
> heck  is that any better for the developer than writing
>     ggplot(myData, aes(x = myData$myX, y = myData$myY))

Well, for one, because it does not always work, see e.g. the examples
and links here:

> or using Dirk Eddelbuettel's suggestion of calling utils::globalVariables ??

Because if you refer to a hundred different columns in your plots, then
you'll need to add all of them to globalVariables(), and this is error prone
and cumbersome to update. If you only refer a handful of columns, then sure,
this will work as well.



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