Rstudio: "No addins found" despite addins installed

Question

I'm trying to install Rstudio addins, but they don't show up in the Addins button or Tools → Addins → Browse Addins... menu. I first updated my Rstudio, and then reinstalled again, to no avail.

This is how I proceed:

devtools::install_github("rstudio/addinexamples", type = "source")

It installs successfully (and I can check that it appears correctly in the package tab or in C:\Users\USERNAME\Documents\R\win-library\4.0\addinexamples) but still does not show up under the addins button. Username has special characters though (French accents). Would that be the problem?

Even after loading the library manually as so:

library(addinexamples)

The library appears loaded but no button. I tried many other packages with the same result (e.g., addinmanager, addinslist, colourpicker, esquisse). I also tried installing packages from CRAN directly with the same results. E.g.,

install.packages("datapasta")
package ‘datapasta’ successfully unpacked and MD5 sums checked

Any idea? Thanks.

sessionInfo()
R version 4.0.3 (2020-10-10)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 19042)

Matrix products: default

locale:
[1] LC_COLLATE=English_Canada.1252  LC_CTYPE=English_Canada.1252    LC_MONETARY=English_Canada.1252
[4] LC_NUMERIC=C                    LC_TIME=English_Canada.1252    

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

loaded via a namespace (and not attached):
 [1] lattice_0.20-41  codetools_0.2-16 mvtnorm_1.1-1    zoo_1.8-8        psych_2.0.7      MASS_7.3-53     
 [7] grid_4.0.3       nlme_3.1-149     xtable_1.8-4     coda_0.19-4      estimability_1.3 multcomp_1.4-13 
[13] bootES_1.2       Matrix_1.2-18    boot_1.3-25      sandwich_2.5-1   splines_4.0.3    TH.data_1.0-10  
[19] tools_4.0.3      emmeans_1.5.1    parallel_4.0.3   survival_3.2-7   compiler_4.0.3   mnormt_2.0.1   

Reposted from: https://community.rstudio.com/t/no-addins-found/92070

Answer 1

Ok I think I now what solved the issue. You can not have any special character in your .libPaths(). In my case it was the ö. Once I changed the .libPaths() to a special character free directory addins did appear in RStudio (see the Screenshot below)

Step-By-Step Guide:

1. Check if your standard serach paths for R (.libPaths()) contains special characters (e.g., ö, é or others). In my case it did:

   .libPaths()
   [1] "C:/Users/Björn/Documents/R/win-library/4.1" "C:/Program Files/R/R-4.1.1/library" 
   

2. Create a safety backup of your current .libpaths():

   # Creates an .rds file in the current working directory
   saveRDS(.libPaths(),"BackupR-PackageSearchPaths.rds")
   

3. Create a new directory without any special characters, where you want to store R-Packages in the future. You could for example use: C:/Rpackages

4. If you want to make your life easier go to the old directory of R-packages (in my case: C:/Users/Björn/Documents/R/win-library/4.1 and copy all packages to the new directory C:/Rpackages

5. Add the new directory to the .libPaths().
   Please note: Don't get confused with the windows default backslash (\) in paths. Just use the forward slash like C:/Rpackages or make sure to escape the backslash with a double backslash \\

   .libPaths(c("C:/Rpackages","C:/Program Files/R/R-4.1.1/library" ))
   

6. On restart of Rstudio however the .libPaths() resets to the default. To change this behavior you want to add the new directory to the environment (path) variables on your local machine, as pointed out by RemPsyc. Just press win + r to open the run command and enter the following text

   rundll32.exe sysdm.cpl,EditEnvironmentVariables

   

7. This will open the environment variable editing window: there you can click on "new" and add the following - see also this answer

   Variable name: R_LIBS_USER
   Variable value: C:/software/Rpackages

Result:

This solve the issue for me

Setup
R = 4.1.1
RStudio Version 1.4.1717