> library(Rcmdr)
Loading required package: splines
Loading required package: RcmdrMisc
Loading required package: car
Error in loadNamespace(i, c(lib.loc, .libPaths()), versionCheck = vI[[i]]) :
there is no package called ‘lme4’
Error: package ‘car’ could not be loaded
>
输入lib命令,总是出现错误