I\'m currently running R Version 3.3.3 on Windows and have ggplot2 version 2.2.1 and the sf package version 0.5-4 and am getting an error saying that R could not find the fu
While running R as the administrator, reinstall ggplot2 like this:
devtools::install_github("tidyverse/ggplot2") require(ggplot2)
You should be able to see it now with ?geom_sf
For questions related to using devtools, see this SO answer.