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新手刚学R语言，请问这个问题怎么解决 #41

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Ethan20000131 opened this issue Feb 26, 2020 · 0 comments

Ethan20000131 commented Feb 26, 2020

y<-load_nCov2019()

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") :
不知如何将'date'转换成“Date”类别

新手刚学R语言，请问这个问题怎么解决

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