我是 R 的新手，我在下面遇到这个问题。
1.
Install.packages("swirl")
The downloaded binary packages are in
/var/folders/ts/syx225mj4fb7ky5_tsxn08vc0000gn/T//RtmprWr2vv/downloaded_packages
2.
library(swirl)
Error: package or namespace load failed for ‘swirl’ in library.dynam(lib, package, package.lib):
shared object ‘stringi.so’ not found
我该如何从这里开始？