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日期軸線我有幾個數據集類似於https://www.dropbox.com/s/j9ihawgfqwxmkgc/pred.csv?dl=0ggplot geom_line不工作
從CSV加載它們,然後繪製工細
predictions$date <- as.Date(predictions$date)
plot(predictions$date, predictions$pct50)
但是,當我想用GGPLOT得出這些數據預測點到情節將它們與原來的點狀比較:
p = ggplot(theRealPastDataValues,aes(x=date,y=cumsum(amount)))+geom_line()
此命令
p + geom_line(predictions, aes(x=as.numeric(date), y=pct50))
生成以下錯誤:
ggplot2 doesn't know how to deal with data of class uneval
但作爲第一plot(predictions$date, predictions$pct50)
作品與數據我不明白什麼是錯的。
編輯
dput(predictions[1:10, c("date", "pct50")])
structure(list(date = c("2009-07-01", "2009-07-02", "2009-07-03",
"2009-07-04", "2009-07-05", "2009-07-06", "2009-07-07", "2009-07-08",
"2009-07-09", "2009-07-10"), pct50 = c(4276, 4076, 4699.93, 4699.93,
4699.93, 4699.93, 4664.76, 4627.37, 4627.37, 4627.37)), .Names = c("date",
"pct50"), row.names = c(NA, 10L), class = "data.frame")
編輯2
我改變這個
p + geom_line(data = predictions, aes(x=as.numeric(date), y=pct50))
,並改爲錯誤:
Invalid input: date_trans works with objects of class Date only
Zusätzlich: Warning message:
In eval(expr, envir, enclos) : NAs created
所以我覺得提示How to deal with "data of class uneval" error from ggplot2?(見評論)是一個好主意,還有點情節不起作用。
'?geom_line'顯示第一個參數是'mapping = NULL'。嘗試明確指出'數據=預測' – tospig
[這個答案](http://stackoverflow.com/a/16486873/4002530)是類似的 – tospig
確定 - 請參閱編輯 –