我要做一个柱状图，其中最大的柱状图离y轴最近，最短的柱状图离y轴最远。这有点像我的表格
Name Position
1 James Goalkeeper
2 Frank Goalkeeper
3 Jean Defense
4 Steve Defense
5 John Defense
6 Tim Striker
所以我试图建立一个条形图，根据位置显示球员的数量
p <- ggplot(theTable, aes(x = Position)) + geom_bar(binwidth = 1)
但是图表显示的是门将栏，然后是防守栏，最后是前锋栏。我希望图表的顺序是，防守条最靠近y轴，守门员条，最后是前锋条。 谢谢
当前回答
除了forcats::fct_infreq之外，由 @HolgerBrandl，有forcats::fct_rev，它颠倒了因子的顺序。
theTable <- data.frame(
Position=
c("Zoalkeeper", "Zoalkeeper", "Defense",
"Defense", "Defense", "Striker"),
Name=c("James", "Frank","Jean",
"Steve","John", "Tim"))
p1 <- ggplot(theTable, aes(x = Position)) + geom_bar()
p2 <- ggplot(theTable, aes(x = fct_infreq(Position))) + geom_bar()
p3 <- ggplot(theTable, aes(x = fct_rev(fct_infreq(Position)))) + geom_bar()
gridExtra::grid.arrange(p1, p2, p3, nrow=3)
其他回答
使用scale_x_discrete (limits =…)指定条形图的顺序。
positions <- c("Goalkeeper", "Defense", "Striker")
p <- ggplot(theTable, aes(x = Position)) + scale_x_discrete(limits = positions)
@GavinSimpson:重新排序是一个强大而有效的解决方案:
ggplot(theTable,
aes(x=reorder(Position,Position,
function(x)-length(x)))) +
geom_bar()
除了forcats::fct_infreq之外，由 @HolgerBrandl，有forcats::fct_rev，它颠倒了因子的顺序。
theTable <- data.frame(
Position=
c("Zoalkeeper", "Zoalkeeper", "Defense",
"Defense", "Defense", "Striker"),
Name=c("James", "Frank","Jean",
"Steve","John", "Tim"))
p1 <- ggplot(theTable, aes(x = Position)) + geom_bar()
p2 <- ggplot(theTable, aes(x = fct_infreq(Position))) + geom_bar()
p3 <- ggplot(theTable, aes(x = fct_rev(fct_infreq(Position)))) + geom_bar()
gridExtra::grid.arrange(p1, p2, p3, nrow=3)
一个简单的基于dplyr的因子重排序可以解决这个问题:
library(dplyr)
#reorder the table and reset the factor to that ordering
theTable %>%
group_by(Position) %>% # calculate the counts
summarize(counts = n()) %>%
arrange(-counts) %>% # sort by counts
mutate(Position = factor(Position, Position)) %>% # reset factor
ggplot(aes(x=Position, y=counts)) + # plot
geom_bar(stat="identity") # plot histogram
如果不想使用ggplot2，还有一个ggpubr，它为ggbarplot函数提供了一个非常有用的参数。你可以对条形图进行排序。Val在“desc”和“asc”中是这样的:
library(dplyr)
library(ggpubr)
# desc
df %>%
count(Position) %>%
ggbarplot(x = "Position",
y = "n",
sort.val = "desc")
# asc
df %>%
count(Position) %>%
ggbarplot(x = "Position",
y = "n",
sort.val = "asc")
由reprex包于2022-08-14创建(v2.0.1)
如您所见，对条形进行排序非常简单。如果条形图是分组的，也可以这样做。查看上面的链接，获取一些有用的例子。
