hi dear all
i'm trying to install packages in R
it connects and downloads the packeges but it does not install
here what i write to install package:
install.packages("devtools")
and this is the error i recieve :
downloaded 363 KB
Warning: invalid package ‘/users/root/tmp/RtmpC4INwd/downloaded_packages/devtools_2.2.1.tar.gz’
Error: ERROR: no packages specified
The downloaded source packages are in
‘/users/$USER/tmp/RtmpC4INwd/downloaded_packages’
Updating HTML index of packages in '.Library'
Making 'packages.html' ... done
There were 50 or more warnings (use warnings() to see the first 50)
can anyone help me please