thank you, I tried to update but got this message
WARNING: Rtools is required to build R packages but is not currently installed. Please download and install the appropriate version of Rtools before proceeding:
https://cran.rstudio.com/bin/windows/Rtools/
Installing package into ‘C:/Users/Owner/Documents/R/win-library/3.5’
(as ‘lib’ is unspecified)
There is a binary version available but the
source version is later:
binary source needs_compilation
xfun 0.13 0.20 TRUE
The problem is I just downloaded rtools newest version so I am confused
thank you so much for the help