Help needed: unable to install any package in Rstudio

RStudio IDE
1

I am unable to install any package in R studio. The problem really troubles me these days.

install.packages("openxlsx")
Warning in install.packages :
unable to access index for repository http://cran.rstudio.com/src/contrib:
cannot open URL 'http://cran.rstudio.com/src/contrib/PACKAGES'

Warning messages:
1: In download.file(mirrors_csv_url, destfile = mirrors_csv, quiet = TRUE) :
URL 'http://cran.r-project.org/CRAN_mirrors.csv': status was 'Couldn't resolve host name'
2: In download.file(mirrors_csv_url, destfile = mirrors_csv, quiet = TRUE) :
URL 'http://cran.r-project.org/CRAN_mirrors.csv': status was 'Couldn't resolve host name'

The full warning is below (sry I don't know how to quote the code). I've adjusted the settings in 'packages' as instructed in other posts, but it doesn't work.

截屏2024-09-26 08.37.44
截屏2024-09-26 08.37.441920×1247 230 KB

Any help will be really appreciated!
Thanks in advance!

2

Try opening your browser and directing it to

https://cran.rstudio.com/src/contrib/PACKAGES

If you get an error trying that, there is some setting in your general web access that is blocking the website. Are you behind a corporate firewall?

3

I don't have an error when entering the site, and I've checked that I had already turned off the firewall in the system setting of my Mac. I'm not behind a corporate firewall.

4

Can you read this data set from RStudio?

TestDF <- read.csv("https://sebastiansauer.github.io/data/TeachingRatings.csv")
5

TestDF <- read.csv("https://sebastiansauer.github.io/data/TeachingRatings.csv")
Error in file(file, "rt") :
cannot open the connection to 'https://sebastiansauer.github.io/data/TeachingRatings.csv'
In addition: Warning message:
In file(file, "rt") :
URL 'https://sebastiansauer.github.io/data/TeachingRatings.csv': status was 'Couldn't resolve host name'

I cannot read this data =(

6

I would try resetting RStudio. If you haven't tried simply restarting RStudio, try that first. If that does not work, shutdown RStudio and run this command in the terminal.

mv ~/.local/share/rstudio ~/.local/share/rstudio-backup

Then restart RStudio.

7

I've already restarted Rstudio for several times, but nothing changed.

I run the command in the terminal, and it shows:
(base) fanxuehans-MacBook-Pro:1 fanxuehan$ mv ~/.local/share/rstudio ~/.local/share/rstudio-backup
mv: rename /Users/fanxuehan/.local/share/rstudio to /Users/fanxuehan/.local/share/rstudio-backup/rstudio: Directory not empty

When I install packages after restarting Rstudio, it still shows:

install.packages("shiny")
Warning in install.packages :
unable to access index for repository http://cran.rstudio.com/src/contrib:
cannot open URL 'http://cran.rstudio.com/src/contrib/PACKAGES'
Warning in install.packages :
unable to access index for repository http://cran.rstudio.com/bin/macosx/big-sur-arm64/contrib/4.4:
cannot open URL 'http://cran.rstudio.com/bin/macosx/big-sur-arm64/contrib/4.4/PACKAGES'

8

It looks like the mv command did not work. I don't see anything wrong with what you typed. Can you navigate to the /Users/fanxuehan/.local/share/ folder and rename the rstudio file to rstudio-backup?

I have to stop for tonight, it is late here.

9

Thank you so much! I'll try this later.
Good night :smiley:

10

Seems like you cannot download any any from within R. What is the output of this?

getOption("download.file.method")
getOption("url.method")

Do you have any custom settings in your ~/.Rprofile file?

11

It shows:

getOption("download.file.method")
NULL
getOption("url.method")
NULL

12

I've navigate to the /Users/fanxuehan/.local/share/ folder, but sorry that I'm not so sure about how to rename the rstudio file to rstudio-backup TT

13

It is unlikely that this has much to do with RStudio. It is an issue with R itself, not Rstudio.

First, I would turn on the "Use secure download method for HTTP" in the RStudio config.

Second, check that you have the http_proxy or https_proxy or HTTP_PROXY or HTTPS_PROXY environment variables set.

After that, try if this works.

curlGetHeaders("https://cran.rstudio.com")