R ggplot2简单条图绘制

Posted onAuthorcnliutz

In the following graph, we’ll plot the mean illiteracy rate forregions of the United States in 1970. The built-in R dataset state.x77 has the illiteracy rates by state, and the datasetstate.region has the region names for each state. The following listing provides the code needed to create the graph

在下图中，我们将绘制1970年在美国的大区。内置R数据集state.x77按州列出了文盲率，数据集state.region具有每个州的区域名称。这个下面的列表提供了创建图形所需的代码：

```{r}states <-data.frame(state.region,state.x77)
library(dplyr)
library(ggplot2)
plotdata <-states %>%
  group_by(state.region) %>%
  summarize(mean=mean(Illiteracy))   #Illiteracy文盲
plotdata
ggplot(plotdata, aes(x=reorder(state.region, mean), y=mean)) + 
 geom_bar(stat="identity") + 
 labs(x="Region", 
 y="", 
 title = "Mean Illiteracy Rate")```