ggplot2绘图学习 Stripcharts / 四六文摘

之前我们学习了ggplot绘制单变量，两个连续变量的图形，两个离散型变量。对于一个离散型变量，一个连续型变量，有很多作图方式，包括箱图，点图等等

· geom_boxplot() for box plot
· geom_violin() for violin plot
· geom_dotplot() for dot plot
· geom_jitter() for stripchart
· geom_line() for line plot
· geom_bar() for bar plot

ggplot2绘图学习点图

ggplot2绘图学习小提琴图

ggplot2绘图学习箱图

今天我们介绍一下Stripcharts

library(ggplot2)data("ToothGrowth")ToothGrowth$dose <- as.factor(ToothGrowth$dose)e <- ggplot(ToothGrowth, aes(x = dose, y = len))

主要函数及参数

· Key functions: geom_jitter(), stat_summary()
· Key arguments to customize the plot: alpha, color, shape, size and fill.

基础用法

# 基础图e + geom_jitter()# 改变点的位置 0.2表示震动幅度e + geom_jitter(position = position_jitter(0.2))# 改变点的形状和大小e + geom_jitter(position=position_jitter(0.2), shape=17, size = 1.2)

添加统计值

stat_summary() 可以用来添加统计值

添加均值或中位数

e + geom_jitter(position = position_jitter(0.2)) + stat_summary(fun = mean, geom = "point", shape = 18, size = 3, color = "red")

添加误差棒（均值加减标准差）

e + geom_jitter(position = position_jitter(0.2))+ stat_summary(fun.data="mean_sdl", fun.args = list(mult=1), geom="pointrange", color = "red")

与箱图或者小提琴图合并

# 与箱图合并e + geom_boxplot() + geom_jitter(position = position_jitter(0.2))# 与小提琴合并e + geom_violin(trim = FALSE) + geom_jitter(position = position_jitter(0.2))# 三合一e + geom_violin(trim = FALSE) + geom_jitter(position = position_jitter(0.2)) + stat_summary(fun.data="mean_sdl", fun.args = list(mult=1), geom="pointrange", color = "red")

通过颜色区分分组

# 单一颜色e + geom_jitter(position = position_jitter(0.2), color = "steelblue") + theme_minimal()# 不同分组不同颜色e + geom_jitter(aes(color = dose), position = position_jitter(0.2)) + theme_minimal()

手动设置颜色

e2 <- e + geom_jitter(aes(color = dose), position = position_jitter(0.2)) + theme_minimal()e2 + scale_fill_manual(values=c("#999999", "#E69F00", "#56B4E9"))e2 + scale_color_brewer(palette="Dark2")

多重分组

改变不同组的颜色和形状

# 改变不同组的颜色和形状e + geom_jitter(aes(color = supp, shape = supp), position=position_jitter(0.2))

改变不同组的点的位置

e + geom_jitter(aes(color = supp, shape = supp), position=position_dodge(0.2))

多重分组添加箱图

# 改变颜色e + geom_jitter(aes(color = supp, shape = supp), position=position_jitter(0.2))+ scale_color_manual(values=c("#999999", "#E69F00"))# 加箱子e + geom_boxplot(color = "black") + geom_jitter(aes(color = supp, shape = supp), position=position_jitter(0.2))# 改变位置e + geom_boxplot(aes(color = supp), position=position_dodge(0.8)) + geom_jitter(aes(color = supp, shape = supp), position=position_dodge(0.8))

资源贴

生信小课堂资源汇总

单基因泛癌分析

TCGA单基因免疫相关泛癌分析（应要求，对出图添加更细致的描述）

ggplot2绘图学习 Stripcharts

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