这篇文章主要为大家展示了“如何利用ggplot2绘制箱线图并进行分面处理”，内容简而易懂，条理清晰，希望能够帮助大家解决疑惑，下面让小编带领大家一起研究并学习一下“如何利用ggplot2绘制箱线图并进行分面处理”这篇文章吧。
利用ggplot2绘制箱线图，并进行分面处理。
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library('ggplot2')########################画图
library('reshape2')########################melt
library('grid') ########################分面
A =rep( c("A","B","C","D"),each=2)
B = c(6.332968,9.368328,6.674348,4.127901,5.192845,6.652865,7.829350,6.995062)
C = c(5.367671,7.286253,5.217053,3.875520,6.679444,6.127819,5.091166,7.942029)
D = c(5.171107,6.232718,5.320568,4.924498,7.140883,4.228142,5.793514,6.347785)
E = c(5.533754,6.152393,6.113618,4.960935,5.959568,5.078903,4.871103,5.223206)
F = rep(c("sample1","sample2"),len=4)
dat = data.frame(A,B,C,D,E)
names(dat)[1] = c("type")
names(dat)[2:5]=F
dat = melt(dat,variable.name="Sample",value.name = "Num")
head(dat)绘制基本的箱线图
##################按照类型进行统计
P_box=ggplot(data=dat,aes(x=type,y=Num)) +
geom_boxplot(fill="grey",width=0.4,notch=F)+ ##########填充颜色fill, 宽，中位线缺刻notch=T
labs(x="type",y="Num")+
theme(plot.title = element_text(size = 25,face = "bold", vjust = 0.5, hjust = 0.5),
legend.title = element_blank(),
legend.text = element_text(size = 18, face = "bold"),
legend.position = 'right',
legend.key.size=unit(0.8,'cm'),
axis.ticks.x=element_blank(),###########取消x轴刻度线
axis.text.x=element_text(size = 10,face = "bold", vjust = 0.5, hjust = 0.5),############刻度标签文字大小等设置
axis.text.y=element_text(size = 10,face = "bold", vjust = 0.5, hjust = 0.5),
axis.title.x = element_text(size = 20,face = "bold", vjust = 0.5, hjust = 0.5),
axis.title.y = element_text(size = 20,face = "bold", vjust = 0.5, hjust = 0.5),
######取消默认的背景颜色方框等
panel.background = element_rect(fill = "transparent",colour = "black"),
panel.grid.minor = element_blank(),
panel.grid.major = element_blank(),
plot.background = element_rect(fill = "transparent",colour = "black"))
print(P_box)利用样品进行分面
# 基于样品进行分面
P_box=ggplot(data=dat,aes(x=type,y=Num)) +
geom_boxplot(fill="grey",width=0.4,notch=F)+
labs(x="type",y="Num")+
theme(plot.title = element_text(size = 25,face = "bold", vjust = 0.5, hjust = 0.5),
legend.title = element_blank(),
legend.text = element_text(size = 18, face = "bold"),
legend.position = 'right',
legend.key.size=unit(0.8,'cm'),
axis.ticks.x=element_blank(),
axis.text.x=element_text(size = 10,face = "bold", vjust = 0.5, hjust = 0.5),
axis.text.y=element_text(size = 10,face = "bold", vjust = 0.5, hjust = 0.5),
axis.title.x = element_text(size = 20,face = "bold", vjust = 0.5, hjust = 0.5),
axis.title.y = element_text(size = 20,face = "bold", vjust = 0.5, hjust = 0.5),
panel.background = element_rect(fill = "transparent",colour = "black"),
panel.grid.minor = element_blank(),
panel.grid.major = element_blank(),
plot.background = element_rect(fill = "transparent",colour = "black"))+
facet_grid(.~Sample) #########分面
print(P_box)以上是“如何利用ggplot2绘制箱线图并进行分面处理”这篇文章的所有内容，感谢各位的阅读！相信大家都有了一定的了解，希望分享的内容对大家有所帮助，如果还想学习更多知识，欢迎关注亿速云行业资讯频道！
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