R语言导入数据:
Warning: unable to access index for repository https://cran.rstudio.com/src/contrib:
cannot open URL 'https://cran.rstudio.com/src/contrib/PACKAGES'
Warning: unable to access index for repository https://cran.rstudio.com/src/contrib:
cannot open URL 'https://cran.rstudio.com/src/contrib/PACKAGES'
遇到这种警告;提示是打不开链接,你切换为国内的源试试
Rstudio设置如下
Tools>global options>packages