使用theme_bw在ggplot2中绘制标题

Question

默认情况下,标题是左对齐的,从ggplot 2.2.0开始.为了使它们再次居中,这篇文章已经解释过了:

ggplot2中的中心绘图标题

这在我的情况下也很完美,但是如果我使用theme_bw则不行.

dat <- data.frame(
  time = factor(c("Lunch","Dinner"), levels=c("Lunch","Dinner")),
  total_bill = c(14.89, 17.23)
)

ggplot(data=dat, aes(x=time, y=total_bill, fill=time)) + 
  geom_bar(colour="black", fill="#DD8888", width=.8, stat="identity") + 
  guides(fill=FALSE) +
  xlab("Time of day") + ylab("Total bill") +
  ggtitle("Average bill for 2 people")+
  theme(plot.title = element_text(hjust = 0.5))+
  theme_bw()

我尝试将主题参数传递给 theme_bw()

theme_bw(plot.title = element_text(hjust = 0.5))

但那也没有用.

有任何想法吗？非常感谢帮助

Answer 1

你只需要反转theme_bw和theme

ggplot(data=dat, aes(x=time, y=total_bill, fill=time)) + 
  geom_bar(colour="black", fill="#DD8888", width=.8, stat="identity") + 
  guides(fill=FALSE) +
  xlab("Time of day") + ylab("Total bill") +
  ggtitle("Average bill for 2 people") +
  theme_bw() +
  theme(plot.title = element_text(hjust = 0.5))