I know that this question is similar to previously asked questions. However, this question differs in some ways.

I have not been able to install any packages into R for some time now. Here's the code:

install.packages("GGally")
Installing package into ‘C:/Users/my_usernames/Documents/R/win-library/4.1’
(as ‘lib’ is unspecified)
Warning in install.packages :
  'lib = "C:/Users/my_username/Documents/R/win-library/4.1"' is not writable

After this, the system keeps prompting me to use a personal library, to which I clicked Yes

trying URL 'https://cran.rstudio.com/bin/windows/contrib/4.1/GGally_2.1.2.zip'
Content type 'application/zip' length 1637552 bytes (1.6 MB)
downloaded 1.6 MB

Warning in install.packages :
  cannot create dir 'C:\Users\my_username\Documents\R\win-library\4.1\file778128e2f03', reason 'No such file or directory'
Error in install.packages : unable to create temporary directory ‘C:\Users\my_username\Documents\R\win-library\4.1\file778128e2f03’

Some things that I did but didn't work out:

1. Running RStudio with administrator privilege

2. Using Tools > Install Packages --> after this, a prompt to create a personal library appears, and if I click Yes, the prompt keeps reappearing without any action

3. Checking the folder manually, and I found that the path C:\Users\my_username\Documents\R\win-library\4.1\ exists

4. Using dir.create and .libPaths() as suggested by teichert in

   CodePudding user response：

   install.packages("GGally")
   Installing package into ‘C:/Users/my_usernames/Documents/R/win-library/4.1’
   (as ‘lib’ is unspecified)
   Warning in install.packages :
     'lib = "C:/Users/my_username/Documents/R/win-library/4.1"' is not writable
   

   Maybe you should change "my_usernames" part. you write your your own name

   CodePudding user response：

   maybe you need to run Rstudio as "administrator" to be able to install on this folder. so you can fix that problem

   CodePudding user response：

   After this, the system keeps prompting me to use a personal library, to which I clicked Yes "try to click no"