使用 coord_flip 反转分组条形图中条形的顺序

使用来自的代码here，我意识到了一些我不明白的事情：

library(ggplot2)

LoTRdata <- structure(list(Film = structure(c(1L, 1L, 1L, 1L, 1L, 1L, 3L, 
3L, 3L, 3L, 3L, 3L, 2L, 2L, 2L, 2L, 2L, 2L), .Label = c("The Fellowship Of The Ring", 
"The Return Of The King", "The Two Towers"), class = "factor"), 
    Race = structure(c(1L, 1L, 2L, 2L, 3L, 3L, 1L, 1L, 2L, 2L, 
    3L, 3L, 1L, 1L, 2L, 2L, 3L, 3L), .Label = c("Elf", "Hobbit", 
    "Man"), class = "factor"), Gender = structure(c(1L, 2L, 1L, 
    2L, 1L, 2L, 1L, 2L, 1L, 2L, 1L, 2L, 1L, 2L, 1L, 2L, 1L, 2L
    ), .Label = c("Female", "Male"), class = "factor"), Words = c(1229L, 
    971L, 14L, 3644L, 0L, 1995L, 331L, 513L, 0L, 2463L, 401L, 
    3589L, 183L, 510L, 2L, 2673L, 268L, 2459L)), .Names = c("Film", 
"Race", "Gender", "Words"), class = "data.frame", row.names = c(NA, 
-18L))

p <- ggplot(LoTRdata, aes(x = Race, y = Words, fill = Film))
p + geom_bar(stat = "identity", position = "dodge") +
  coord_flip() + guides(fill = guide_legend())

为什么条形的顺序颠倒了？我怎样才能改变酒吧的顺序

我知道我可以使用guides(fill = guide_legend(reverse = TRUE))但随后条形图和图例的顺序都颠倒了（图例不再按字母顺序排序）。

与此相反question，其中每个分组条的顺序取决于最高出现次数，我只想知道如何反转每个组的顺序（与我不使用的顺序相同）coord_flip).

p <- ggplot(LoTRdata, aes(x = Race, y = Words, fill = Film))
p + geom_bar(stat = "identity", position =  position_dodge2(reverse=TRUE)) +
coord_flip() 

也许你可以开始使用position_dodge2函数