我很难加载Caret包装。对这个问题的微不足道道歉。目前正在使用R 3.2.2＆＃34; Fire Saftey＆＃34; - 我目前无法升级到3.3.0。我曾尝试查看插入历史存档，并通过r studio手动下载旧版本的包;这也没用。帮帮我。请参阅下面的插入插入符号时发生的错误。
> library(caret)
Loading required package: lattice
Loading required package: ggplot2
Error in loadNamespace(j <- i[[1L]], c(lib.loc, .libPaths()), versionCheck = vI[[j]]) :
there is no package called ‘pbkrtest’
In addition: Warning messages:
1: package ‘caret’ was built under R version 3.2.5
2: package ‘ggplot2’ was built under R version 3.2.5
Error: package or namespace load failed for ‘caret’
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