r - R包安装失败：无法更改工作目录

尝试安装软件包时出现以下错误消息＆＃34; rChart＆＃34;在R：

> install_github("saurfang/rCharts", ref = "utf8-writelines")
Downloading GitHub repo saurfang/rCharts@utf8-writelines
from URL https://api.github.com/repos/saurfang/rCharts/zipball/utf8-writelines
Installing rCharts
"C:/PROGRA~1/R/R-34~1.2/bin/x64/R" --no-site-file --no-environ --no-save --no-restore --quiet CMD INSTALL  \
  "C:/Users/Administrator/AppData/Local/Temp/RtmpCYR9NS/devtools246c28fe1bc3/saurfang-rCharts-e0106ed"  \
  --library="C:/Users/Administrator/Documents/R/win-library/3.4" --install-tests 

**Installation failed: cannot change working directory**

有人建议我安装＆＃34; Rcpp＆＃34;之前＆＃34; rChart＆＃34;。所以我这样做了。但是，之前还是一样的。

boolean exists(Object roads, int[] road)

R包安装失败：无法更改工作目录

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