r - R中的Rcmdr包无法打开

Question

我无法打开 Rcmdr 包，弹出一些类似这样的输出：

Loading required package: splines
Loading required package: RcmdrMisc
Loading required package: car
Loading required package: sandwich
Error: package or namespace load failed for 'RcmdrMisc' in loadNamespace(j <- i[[1L]], c(lib.loc, .libPaths()), versionCheck = vI[[j]]):
 there is no package called 'gridExtra'
Error: package 'RcmdrMisc' could not be loaded

我应该怎么办？我对 R 的了解为零。请帮助！！！！