ggplot2中离散y轴的倒序

Question

情况与数据

我有一个比赛中运动员位置的数据框 df：

df <- structure(list(athlete = c("A", "B", "C", "D", "E", "F", "G",
"H", "I", "J", "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", 
"A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "A", "B", "C", 
"D", "E", "F", "G", "H", "I", "J", "A", "B", "C", "D", "E", "F", 
"G", "H", "I", "J", "A", "B", "C", "D", "E", "F", "G", "H", "I", 
"J"), distanceRemaining = structure(c(1L, 1L, 1L, 1L, 1L, 1L, 
1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 3L, 3L, 
3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 
4L, 4L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 6L, 6L, 6L, 6L, 
6L, 6L, 6L, 6L, 6L, 6L), .Label = c("1400m", "1200m", "600m", 
"400m", "200m", "FINISH"), class = "factor"), position = c(10, 
6, 7, 8, 2, 1, 3, 5, 9, 4, 9, 8, 7, 6, 4, 3, 1, 5, 10, 2, 8, 
7, 9, 5, 6, 2, 3, 1, 10, 4, 9, 8, 6, 5, 7, 3, 2, 4, 10, 1, 4, 
5, 1, 6, 8, 3, 2, 7, 10, 9, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10)), row.names = c(NA, 
-60L), .Names = c("athlete", "distanceRemaining", "position"), class = "data.frame")

我正在用

绘制数据

library(ggplot2)
g <- ggplot(df, aes(x=distanceRemaining, y =position, colour=athlete, group = athlete))
g <- g + geom_point()
g <- g + geom_line(size=1.15)
g <- g + scale_y_discrete()
g

给予

问题

如何反转 y 轴的顺序，使 10 在底部，1 在顶部？

Answer 1

尝试以下操作：

g <- ggplot(df, aes(x=distanceRemaining, y =position, colour=athlete, group = athlete))
g <- g + geom_point()
g <- g + geom_line(size=1.15)
g <- g +  scale_y_continuous(trans = "reverse", breaks = unique(df$position))
g

Answer 2

你只需要将位置变量变成一个因子，然后反转它的水平：

require(dplyr)
df <- df %>% mutate(position = factor(position), 
                    position = factor(position, levels = rev(levels(position)))

然后用你的代码你会得到：

Answer 3

对于离散轴，使用 reorder() 对我有用。在上述问题的上下文中，它看起来像这样：

ggplot(df, aes(x = distanceRemaining, y = reorder(position, desc(position))))

希望对您有所帮助。

Answer 4

根据https://gist.github.com/jennybc/6f3fa527b915b920fdd5:

添加scale_y_discrete(limits = rev(levels(theFactor))) 到你的 ggplot 命令。

Answer 5

另一个使用 forcats 包的选项。

ggplot(df, aes(x = distanceRemaining, y = forcats::fct_rev(factor(position))))

这样做的好处是可以将所有内容都保留在 ggplot 调用中，并且可以与 coord_flip 和 facets_wrap(..., scales = "free")

等其他选项配合使用

Answer 6

有new解，scale_*_discrete(limits=rev)，例子：

tibble(x=1:26,y=letters) %>% 
  ggplot(aes(x,y)) +
    geom_point() +
    scale_y_discrete(limits=rev)

ggplot2中离散y轴的倒序

Reverse order of discrete y axis in ggplot2

r

ggplot2