我正在尝试使用TSAgg程序包在几天内聚合我的数据。但是，我收到以下错误消息：
> Data.1day<-daysAgg(Data.ts,mean)
Warning: namespace ‘memoise’ is not available and has been replaced
by .GlobalEnv when processing object ‘sep’
Warning: namespace ‘memoise’ is not available and has been replaced
by .GlobalEnv when processing object ‘sep’
Error in .get_loc_regs(locale) : could not find function "digest"
当我加载TSAgg时，出现以下警告消息： 警告信息：
1: package ‘TSAgg’ was built under R version 3.0.2
2: package ‘lubridate’ was built under R version 3.0.2
我使用的是R版3.0.1，因为我不想使用测试版本。我有什么办法可以让它发挥作用吗？