在使用 ggplot2 绘图并尝试根据 data.frame 中的数字变量对因子重新排序时，我似乎总是遇到这个问题。
structure(list(Team = structure(1:32, .Label = c("ARI", "ATL",
"BAL", "BUF", "CAR", "CHI", "CIN", "CLE", "DAL", "DEN", "DET",
"GB", "HOU", "IND", "JAC", "KC", "MIA", "MIN", "NE", "NO", "NYG",
"NYJ", "OAK", "PHI", "PIT", "SD", "SEA", "SF", "STL", "TB", "TEN",
"WAS"), class = "factor"), Fans = c(49L, 145L, 175L, 75L, 104L,
167L, 101L, 147L, 157L, 304L, 112L, 338L, 200L, 118L, 37L, 60L,
65L, 225L, 371L, 97L, 163L, 87L, 84L, 102L, 111L, 85L, 422L,
311L, 63L, 56L, 49L, 271L)), .Names = c("Team", "Fans"), row.names = c(NA,
-32L), class = "data.frame")
这不会按粉丝数量对球队重新排序:
ggplot(total.fans, aes(x=reorder(Team, Fans), y=Fans)) + geom_bar()
此转换调用也不会更改数据:
transform(total.fans, variable=reorder(Team, -Fans))
我错过了什么？
最佳答案
它适用于 ggplot2 0.9.3，尽管我收到警告:我认为你想要
ggplot(total.fans, aes(x=reorder(Team, Fans),y=Fans)) +
geom_bar(stat="identity")
(发帖而不是评论，这样我就可以展示情节......)
关于通过数值变量对因子重新排序，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/14033342/