R中具有多个变量的简单条形图-类似于Excel [英] Simple bar plot with multiple variables in R - Similar to Excel

问题描述

我有这个数据框:

Unit <- c(A, B, C, D)
Yes <- c(50, 65, 20, 41)
No <- c(70, 67, 40, 20)
Missing <- c(10, 12, 8, 7)
df <- data.frame(Unit, Yes, No, Missing)

我想在Excel中使用简单的条形图(请参见附件图): Excel情节

I want to use simple bar plot such as in Excel (Please see attached plot):Excel Plot

https://i.stack.imgur.com/BvWSA.jpg

我使用了ggplot，但仅用于一个Var，如果添加其他变量，则会给我错误:

I used ggplot but only for one Var, If I add others it gave me error:

ggplot(data = df, aes(x = Unit, y = Yes)) +
  geom_col() +
  geom_text(aes(label = Yes), position = position_stack(vjust = 0.5))

谢谢.

推荐答案

您的数据必须采用长格式而不是宽格式，才能以ggplot进行绘制

Your data needs to be in long format, not wide format, to plot in ggplot

Unit <- c("A", "B", "C", "D") #character objects need quotes
Yes <- c(50, 65, 20, 41)
No <- c(70, 67, 40, 20)
Missing <- c(10, 12, 8, 7)
df <- data.frame(Unit, Yes, No, Missing)

require(tidyr)
df.long <- gather(df, variable,value, -Unit)

一旦数据采用长格式，position_dodge()就会为您提供所需的图形

Once the data is in long format, position_dodge() will give you the graph you want

ggplot(data = df.long, aes(x = Unit, y = value, fill = variable)) +
  geom_col(position = position_dodge()) 

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