[R-pkg-devel] Warning about ggplot although no ggplot is used anywhere in the package

trace(ggplot2::element_line)

library(fbst)

Hi Riko,
That element_line() is called while loading is not a problem, this is probably just the loading of the NAMESPACE from rstanarm.

There is nothing wrong with this function.
The problem is only when it is used with the argument `size = ` within it.
You need to figure out when that happens.
++




On Thu, 22 Sept 2022 at 15:49, Kelter, Riko <Riko.Kelter at uni-siegen.de (mailto:Riko.Kelter at uni-siegen.de)> wrote:

Hello everyone,



thanks a lot for the help.


I tried the approach to use the trace function to identify where the element_line() command is actually used. In fact, the vignette twodimfbst.Rmd is the problem, but weirdly even if I only load the rstanarm package the trace function tells me that the code is used.


Thus, it seems that one cannot even load the rstanarm package without getting this warning (see the appended PDF screenshot). In fact, the element_line() is identified by the trace function only if the rstanarm or fbst package are loaded inside the vignette. I also tried to replace rstanarm with rstan instead but the same happens because both packages rely on ggplot2.


I also appended the .tar.gz package file so you can check the vignette code yourself if interested.


Has anyone an idea how to avoid this warning on R devel when rstanarm is loaded inside a vignette? I currently see no way to solve this except for not using rstanarm which is inconvenient.


Kind regards,
Riko







From: Alexandre Courtiol <alexandre.courtiol at gmail.com (mailto:alexandre.courtiol at gmail.com)>
Sent: 22 September 2022 14:06
To: Kelter, Riko
Cc: r-package-devel at r-project.org (mailto:r-package-devel at r-project.org)
Subject: Re: [R-pkg-devel] Warning about ggplot although no ggplot is used anywhere in the package


In rstanarm, the function posterior_vs_prior and pp_validate use bayesplot::grid_lines which is defined as:

function (color = "gray50", size = 0.2)
{
theme(panel.grid.major = element_line(color = color, size = size),
panel.grid.minor = element_line(color = color, size = size *
0.5))
}


so bayesplot seems to be the culprit if you use these functions.

On Thu, 22 Sept 2022 at 13:51, Alexandre Courtiol <alexandre.courtiol at gmail.com (mailto:alexandre.courtiol at gmail.com)> wrote:

You could trace the ggplot function using trace(ggplot2::element_line)
and then load the package and run your examples.
Whenever the function is used in the background, it should tell you.
++




On Thu, 22 Sept 2022 at 13:40, Duncan Murdoch <murdoch.duncan at gmail.com (mailto:murdoch.duncan at gmail.com)> wrote:

On 21/09/2022 5:09 p.m., Riko Kelter wrote:

Hello everyone,

I ran R CMD check --as-cran without any errors. However, when I run a check on the current version of r-devel I obtain the following strange error about some ggplot function:
* installing *source* package 'fbst' ...
** using staged installation
** R
** inst
** byte-compile and prepare package for lazy loading
Warning message:
The `size` argument of `element_line()` is deprecated as of ggplot2 3.4.0.
Please use the `linewidth` argument instead.
The weird thing is: Although my package fbst depends on the package rstanarm which itself imports ggplot,
(1) no package code uses ggplot in any form,
(2) no examples use any ggplot commands and
(3) no vignette uses any ggplot command.

Logs are available at https://win-builder.r-project.org/CX36AbHDU6Tl/
I am thankful for any suggestion why this error occurs.
All the best and kind regards,
Riko

Could you provide the source for the package? I can see the DESCRIPTION
file at win-builder, but can't install it myself since I don't use Windows.

Duncan Murdoch

--
Alexandre Courtiol, www.datazoogang.de (http://www.datazoogang.de)

--
Alexandre Courtiol, www.datazoogang.de (http://www.datazoogang.de)

--
Alexandre Courtiol, www.datazoogang.de