R version 3.1.2, got this error when I install a package. How can I fix this? Warning message: In open.connection(con, "r") : unable to connect to 'cran.r-project.org' on port 80.
I want to install a 'psych' package.
Hi- you are trying to install a package, which will download data from the Internet. Not all sites are available through sagemath cloud. If you pick a mirror that is accessible this should work so try
install.packages("psych", repos="http://cran.cs.wwu.edu/")
Make sure that you say "y" (yes) to install the package locally.
Installing package into ‘/projects/<some_id>/R/x86_64-unknown-linux-gnu-library/3.1’ (as ‘lib’ is unspecified)
Asked: 10 years ago
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Last updated: Mar 27 '15
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Probably we need more information about your exact setup. Is there a firewall or something, are you in a Sage notebook server or the Sage math cloud, or a local installation? I have no trouble installing this optional R package within Sage.