我在ggplot中使用facet创建了一个分类数据图。
示例脚本:
#script to produce plot with dummy data
rm(list=ls(all=TRUE))
library(ggplot2)
require(gridExtra)
#put dummy data in df
dummy_data<-data.frame(experiment_number=c(rep("exp_1",15),rep("exp_2",15)),
group=rep(c("A","B","C"),5),yvalue=runif(30, 0.0, 0.05))
# make plot
plot1<-ggplot(data = dummy_data)+
geom_point(aes(x = group, y = yvalue,
colour=group,shape=group),size=3.5,position = position_jitter(w = 0.2)) +
facet_wrap( ~ experiment_number) +
ylab("yvalue") +
xlab("")
#plot
plot1
我现在要添加文字&amp;在图下方的条形图显示与组之间的统计测试相关的p值 - 我刚刚在我手中绘制它的示例(p值刚刚组成)。
注意两个不同面板中的p值会有所不同。我玩过annotate&amp;自定义注释但似乎无法使其工作。有什么想法吗?
非常感谢
答案 0 :(得分:2)
这是一种完全荒谬的方式来做类似于你所要求的事情。我用geom_errorbar
作为条形,所以我不得不翻转坐标系。无论如何,你应该能够自定义它来做你需要的。
rm(list=ls(all=TRUE))
library(ggplot2)
#put dummy data in df
dummy_data<-data.frame(experiment_number=c(rep("exp_1",15),rep("exp_2",15)),
group=rep(c("A","B","C"),5),yvalue=runif(30, 0.0, 0.05))
# make plot
plot1<-ggplot(data = dummy_data)+
geom_point(aes(y = group, x = yvalue, #changed x and y
colour=group,shape=group),size=3.5,position = position_jitter(h = 0.2)) + # changed w=... to h=...
facet_wrap( ~ experiment_number) +
xlab("yvalue") +
ylab("") + coord_flip() # flipped coordinate system
#plot
rng <- range(dummy_data$yvalue) # range
df.lines <- data.frame(ymin=LETTERS[1:3], ymax=LETTERS[c(2,3,1)], x=rng[1]-diff(rng)*1:3/12) #data for geom_errorbar
# data for geom_text
df.txt <- data.frame(y=c("AB", "BC", "B"),
x=rng[1]-diff(rng)*(1:3+.5)/12,
label=c("p=0.003", "p=0.05", "p=0.6",
"p=0.2", "p=0.1", "p=0.05"),
experiment_number=rep(c("exp_1", "exp_2"), each=3))
# add some space and geom_errorbar and geom_text
plot2 <- plot1 + scale_x_continuous(limits=c(rng[1]-diff(rng)/3, rng[2]+diff(rng)/5)) +
geom_errorbar(data=df.lines, aes(x=x, ymin=ymin, ymax=ymax)) +
scale_y_discrete(breaks=LETTERS[1:3], limits=c("A", "AB", "B", "BC", "C")) +
geom_text(data=df.txt, aes(x=x, y=y, label=label), xjust=0.5)
plot2