无法在版本3.4.1上安装漩涡

Question

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

我如何从这里开始？