老师,您好!请问安装拓展包的时候老是跳出来下面的内容是为啥,Warning: unable to access index for repository https://cran.rstudio.com/src/contrib:
cannot open URL 'https://cran.rstudio.com/src/contrib/PACKAGES'
安装r打开之后,WARNING: You're using a non-UTF8 locale, therefore only ASCII characters will work.
Please read R for Mac OS X FAQ (see Help) section 9 and adjust your system preferences accordingly.该怎么办
你好,为什么Rstudio在运行时,总是提示WARNING: Rtools is required to build R packages but is not currently installed. Please download and install the appropriate version of Rtools before proceeding,我已经下载了最新版的R软件
确认删除