RStudio打包R程序包报错如下：WARNING: Rtools is required to build R packages but is not currently installed. Please download and install the appropriate version of Rtools before proceeding:http://cran.rstudio.com/bin/windows/Rtools/解决方案：下载对应版本的Rtools ，安装下载的安装包，勾选将路径添加到环境变...