ggplot用geom_bar中的百分比替换count [英] ggplot replace count with percentage in geom_bar
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问题描述
我有一个dataframe d
:
> (d,20)
groupchange Symscore3
1 4 1
2 4 2
3 4 1
4 4 2
5 5 0
6 5 0
7 5 0
8 4 0
9 2 2
10 5 0
11 5 0
12 5 1
13 5 0
14 4 1
15 5 1
16 1 0
17 4 0
18 1 1
19 5 0
20 4 0
我正在绘制:
< pre $ ggplot(d,aes(groupchange,y = .. count ../ sum(.. count ..),fill = Symscore3))+
geom_bar(position = 闪避)
通过这种方式,每个小节代表整个数据的百分比。
相反,我希望每个栏代表一个相对百分比;即用 groupchange = k
获得的柱的总和应该是 1
。
library(
) dplyr)d2 < - d%>%
group_by(groupchange,Symscore3)%>%
汇总(count = n())%>%
mutate (perc = count / sum(count))
然后您可以绘制它:
ggplot(d2,aes(x = factor(groupchange),y = perc * 100,fill = factor(Symscore3))+
geom_bar(stat =identity,width = 0.7)+
labs(x =Groupchange,y =percent,fill =Symscore)+
theme_minimal(base_size = 14)
这给出:
或者,您可以使用 percent
功能n来自比例
包:
brks < - c(0 ,0.25,0.5,0.75,1)
ggplot(d2,aes(x = factor(groupchange),y = perc,fill = factor(Symscore3)))+
geom_bar(stat =identity,width = 0.7)+
scale_y_continuous(breaks = brks,labels = scales :: percent(brks))+
labs(x =Groupchange,y = NULL,fill = Symscore)+
theme_minimal(base_size = 14)
给出:
I have a dataframe d
:
> head(d,20)
groupchange Symscore3
1 4 1
2 4 2
3 4 1
4 4 2
5 5 0
6 5 0
7 5 0
8 4 0
9 2 2
10 5 0
11 5 0
12 5 1
13 5 0
14 4 1
15 5 1
16 1 0
17 4 0
18 1 1
19 5 0
20 4 0
That I am plotting with:
ggplot(d, aes(groupchange, y=..count../sum(..count..), fill=Symscore3)) +
geom_bar(position = "dodge")
In this way each bar represents its percentage on the whole data.
Instead I would like that each bar represents a relative percentage; i.e. the sum of the bar in obtained with groupchange = k
should be 1
.
解决方案
First summarise and transform your data:
library(dplyr)
d2 <- d %>%
group_by(groupchange,Symscore3) %>%
summarise(count=n()) %>%
mutate(perc=count/sum(count))
Then you can plot it:
ggplot(d2, aes(x = factor(groupchange), y = perc*100, fill = factor(Symscore3))) +
geom_bar(stat="identity", width = 0.7) +
labs(x = "Groupchange", y = "percent", fill = "Symscore") +
theme_minimal(base_size = 14)
this gives:
Alternatively, you can use the percent
function from the scales
package:
brks <- c(0, 0.25, 0.5, 0.75, 1)
ggplot(d2, aes(x = factor(groupchange), y = perc, fill = factor(Symscore3))) +
geom_bar(stat="identity", width = 0.7) +
scale_y_continuous(breaks = brks, labels = scales::percent(brks)) +
labs(x = "Groupchange", y = NULL, fill = "Symscore") +
theme_minimal(base_size = 14)
which gives:
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