I had a problem by installing plotrix
package on R like the following:
> install.packages("plotrix")
Installing package into ‘/home/agn/R/x86_64-pc-linux-gnu-library/3.4’
(as ‘lib’ is unspecified)
Warning in install.packages :
package ‘plotrix’ is not available (for R version 3.4.4)
How could I update R to the latest version (3.6.6)?
[NOTE]:
- OS: Ubuntu 16.04
- R version: 3.4.4