在ggplot2中结合条形图和折线图(双轴) [英] Combining Bar and Line chart (double axis) in ggplot2

问题描述

我在 Excel 中制作了 double-y-axis 图表.在 Excel 中，它只需要基本技能.我想做的是使用 R 中的 ggplot2 库复制这个图表.

I have double-y-axis chart made in Excel. In Excel it requires only basic skills. What I'd like to do is to replicate this chart using the ggplot2 library in R.

我已经这样做了，但我需要在 2nd-y-axis 上绘制响应.

I have already done this, but I need to plot Response on 2nd-y-axis.

我附上了我使用过的可重现代码:

I enclose reproducible code I've used:

#Data generation
Year <- c(2014, 2015, 2016)
Response <- c(1000, 1100, 1200)
Rate <- c(0.75, 0.42, 0.80)

df <- data.frame(Year, Response, Rate)

#Chart
library(ggplot2)

ggplot(df)  + 
  geom_bar(aes(x=Year, y=Response),stat="identity", fill="tan1", colour="sienna3")+
  geom_line(aes(x=Year, y=Rate),stat="identity")+
  geom_text(aes(label=Rate, x=Year, y=Rate), colour="black")+
  geom_text(aes(label=Response, x=Year, y=0.9*Response), colour="black")

推荐答案

首先，将Rate按Rate*max(df$Response)缩放并修改0.9 响应文本的比例.

First, scale Rate by Rate*max(df$Response) and modify the 0.9 scale of Response text.

其次，通过 scale_y_continuous(sec.axis=...) 包含第二个轴:

Second, include a second axis via scale_y_continuous(sec.axis=...):

ggplot(df)  + 
    geom_bar(aes(x=Year, y=Response),stat="identity", fill="tan1", colour="sienna3")+
    geom_line(aes(x=Year, y=Rate*max(df$Response)),stat="identity")+
    geom_text(aes(label=Rate, x=Year, y=Rate*max(df$Response)), colour="black")+
    geom_text(aes(label=Response, x=Year, y=0.95*Response), colour="black")+
    scale_y_continuous(sec.axis = sec_axis(~./max(df$Response)))

产生的结果:

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