dcast错误：`匹配错误（x，table，nomatch = 0L）`

Question

我有一个数据框df，看起来像这样...

"ID","ReleaseYear","CriticPlayerPrefer","n","CountCriticScores","CountUserScores"
"1",1994,"Both",1,5,283
"2",1994,"Critics",0,0,0
"3",1994,"Players",0,0,0
"4",1995,"Both",3,17,506
"5",1995,"Critics",0,0,0
"6",1995,"Players",0,0,0
"7",1996,"Both",18,163,3536
"8",1996,"Critics",2,18,97
"9",1996,"Players",3,20,79

我想翻转数据框，使列如下所示：

"ReleaseYear","Both","Critics","Players"

每个栏位Both',Critics andPlayers would be then` 的值。

当我尝试运行此...

require(dcast)
chartData.CriticPlayerPreferByYear <- dcast(
    data = df,
    formula = ReleaseYear ~ CriticPlayerPrefer,
    fill = 0,
    value.var = n
)

...我得到这个错误：

Error in match(x, table, nomatch = 0L) : 
  'match' requires vector arguments

这里有什么问题？我如何解决它？

Answer 1

你好像少了引号？

data <- read.table(text='"ID","ReleaseYear","CriticPlayerPrefer","n","CountCriticScores","CountUserScores"
"1",1994,"Both",1,5,283
"2",1994,"Critics",0,0,0
"3",1994,"Players",0,0,0
"4",1995,"Both",3,17,506
"5",1995,"Critics",0,0,0
"6",1995,"Players",0,0,0
"7",1996,"Both",18,163,3536
"8",1996,"Critics",2,18,97
"9",1996,"Players",3,20,79"',header=T,sep=",")

library(reshape2)
dcast(data, ReleaseYear ~ CriticPlayerPrefer, value.var="n")

# ReleaseYear Both Critics Players
#       1994    1       0       0
#       1995    3       0       0
#       1996   18       2       3

这就是我得到的。是想要的结果吗？