Rstudio x显示lib没有被指定，有偿求指导

Rstudio x显示lib没有被指定，安装包装不了，有偿求指导

参考这里的问题解决办法

How to Change the Default Library in Rstudio to a Different Default Library or Custom Library This tutorial teaches you how to change the default library in Rstudio. https://www.accelebrate.com/library/how-to-articles/r-rstudio-library