r - ggplot : text printed by geom_text is not clear

Question

使用 geom_text 打印的文本不是很清楚。我怎样才能让它更清楚？

data = data.frame(rnorm(1000))
colnames(data) = "numOfX"
m <- ggplot(data, aes(x=numOfX))
m + geom_histogram(colour = "blue", fill = "white", binwidth = 0.5) +
  annotate("segment", x=10,xend=10,y=20,yend=0,arrow=arrow(), color="blue") +
  geom_text(aes(10, 30, label="Observed \n value"), color = "blue") 

Answer 1

使用 annotate对于文本以及箭头:

m + geom_histogram(colour = "blue", fill = "white", binwidth = 0.5) +
  annotate("segment", x=10,xend=10,y=20,yend=0,arrow=arrow(), color="blue") +
  annotate("text", x=10, y=30, label="Observed \n value", color = "blue")

原因是 geom_text过度绘制数据框中每行数据的文本，而 annotate只绘制一次文本。正是这种过度绘制导致了粗体、像素化的文本。

我相信这个问题最近得到了回答。我会尝试找到一个引用:
最近有人问了一个类似的问题:

ggplot2: Is there a fix for jagged, poor-quality text produced by geom_text()?

How to nicely annotate a ggplot2 (manual)