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1. 写在前面

  今天有时间把之前使用过的一些代码和大家分享，其中箱线图绘制我认为是非常有用的一个部分。之前我是比较喜欢使用origin进行绘图，但是绘制的图不太好看，并且需要进行不断调整，不太方便，所以开始使用R语言进行绘制。

2.箱线图绘制

2.1 相关R包导入

library(openxlsx)
library(tidyverse)
library(ggsignif)
library(ggpubr)
library(RColorBrewer)
library(ggplot2)

2.2 数据导入及格式转换

  由于使用ggplot2进行绘图需要将原本的表格数据进行转换，一下为数据导入和转换方法：
数据格式：

setwd("C:/Users/Desktop/Practice/")
dataT1 <- read.xlsx("T1.xlsx", sheet = 1) # 文件名+sheet的序号
dataS1 <- read.xlsx("S1.xlsx", sheet = 1) # 文件名+sheet的序号
summary(dataT1)
head(dataT1)
summary(dataS1)
head(dataS1)#使用tidyverse包对数据进行处理
dataT1 <- dataT1 %>% gather(key = 'group',value = 'values') %>%  #gather()函数可以把多列数据合并成一列数据filter(!is.na(values)) 
head(dataT1) 
summary(dataT1)dataS1 <- dataS1 %>% gather(key = 'group',value = 'values') %>%  #gather()函数可以把多列数据合并成一列数据filter(!is.na(values)) 
head(dataS1) 
summary(dataS1)dataT1$group<-factor(dataT1$group,levels = c("2dm","4dm","6dm","8dm","10dm"))
dataS1$group<-factor(dataS1$group,levels = c("2dm","4dm","6dm","8dm","10dm"))

数据转换格式：

> head(dataT1)group values
1   2dm 0.8640
2   2dm 0.8500
3   2dm 0.8680
4   2dm 0.8850
5   2dm 0.8870
6   2dm 0.8951

> head(dataS1)group values
1   2dm  0.619
2   2dm  0.610
3   2dm  0.632
4   2dm  0.700
5   2dm  0.679
6   2dm  0.711

2.3 ggplot绘图

(p1 <- ggplot(data = dataT1, aes(x = group, y = values)) +stat_boxplot(geom = "errorbar", width = 0.3, size = 0.8, aes(color = group)) +geom_boxplot(aes(x = group, y = values, colour = group), size = 1.0, width = 0.6) +geom_jitter(mapping = aes(x = group, y = values, colour = group), size = 1.5, alpha = 0.3) +stat_summary(fun = "mean", geom = "point", color = "black", size = 2) +stat_summary(fun = "mean", geom = "line", aes(group = 1), color = "black", size = 1) +scale_color_manual(limits = c("2dm","4dm","6dm","8dm","10dm"), values = c("#8dd3c7", "#fdb462", "#bebada", "#fb8072", "#80b1d3")) +theme_classic(base_line_size = 1) +labs(x = "空间分割等级", y = "Kappa") +theme(text = element_text(size = 16, family = "serif"),axis.ticks.length = unit(0.2, "cm"),  # 设置刻度线的长度axis.ticks = element_line(size = 1),  # 设置刻度线的粗细legend.position = "none",plot.title = element_text(size = 16, colour = "black", hjust = 0.5),axis.title.y = element_text(size = 16, color = "black", vjust = 1.9, hjust = 0.5, angle = 90),legend.title = element_text(color = "black", size = 16),legend.text = element_text(color = "black", size = 16),axis.text.x = element_text(size = 16, color = "black", vjust = 0.5, hjust = 0.5, angle = 0),axis.text.y = element_text(size = 16, color = "black", vjust = 0.5, hjust = 0.5, angle = 0),panel.border = element_rect(color = "black", size = 1, fill = NA),panel.grid.major = element_blank(),panel.grid.minor = element_blank(),axis.line = element_line(colour = "black", size = 2),axis.line.x = element_line(colour = "black", size = 0),axis.line.y = element_line(colour = "black", size = 0))
)(p2 <- ggplot(data = dataS1, aes(x = group, y = values)) +stat_boxplot(geom = "errorbar", width = 0.3, size = 0.8, aes(color = group)) +geom_boxplot(aes(x = group, y = values, colour = group), size = 1.0, width = 0.6) +geom_jitter(mapping = aes(x = group, y = values, colour = group), size = 1.5, alpha = 0.3) +stat_summary(fun = "mean", geom = "point", color = "black", size = 2) +stat_summary(fun = "mean", geom = "line", aes(group = 1), color = "black", size = 1) +scale_color_manual(limits = c("2dm","4dm","6dm","8dm","10dm"), values = c("#8dd3c7", "#fdb462", "#bebada", "#fb8072", "#80b1d3")) +theme_classic(base_line_size = 1) +labs(x = "空间分割等级", y = "Kappa") +theme(text = element_text(size = 16, family = "serif"),axis.ticks.length = unit(0.2, "cm"),  # 设置刻度线的长度axis.ticks = element_line(size = 1),  # 设置刻度线的粗细legend.position = "none",plot.title = element_text(size = 16, colour = "black", hjust = 0.5),axis.title.y = element_text(size = 16, color = "black", vjust = 1.9, hjust = 0.5, angle = 90),legend.title = element_text(color = "black", size = 16),legend.text = element_text(color = "black", size = 16),axis.text.x = element_text(size = 16, color = "black", vjust = 0.5, hjust = 0.5, angle = 0),axis.text.y = element_text(size = 16, color = "black", vjust = 0.5, hjust = 0.5, angle = 0),panel.border = element_rect(color = "black", size = 1, fill = NA),panel.grid.major = element_blank(),panel.grid.minor = element_blank(),axis.line = element_line(colour = "black", size = 2),axis.line.x = element_line(colour = "black", size = 0),axis.line.y = element_line(colour = "black", size = 0))
)

最后将两张图进行拼接并保存：

p1_cowplot <- ggdraw(p1)
p2_cowplot <- ggdraw(p2)
combined_plot <- plot_grid(p1_cowplot, p2_cowplot, ncol = 2, labels = "AUTO") #, labels = "AUTO"
combined_plot
ggsave("combined_plot.jpg", width = 28, height = 10, units = "cm", dpi= 600)

结果展示：

欢迎大家交流指正！