Ethan20000131

代码运行出错

2

 请问这个是为什么出错，试了好几遍似乎都会出现这个问题

y > > ggplot(summary(y), aes(as.Date(date, "%m.%d"), as.numeric(confirm))) + + geom_col(fill='firebrick') + theme_minimal(base_size = 14) + + xlab(NULL) + ylab(NULL) + + labs(caption = paste("accessed date:", time(y))) Error in as.Date.default(date, "%m.%d")...