ggplot:由geom_text打印的文本不清楚 [英] ggplot: text printed by geom_text is not clear

问题描述

使用geom_text打印的文本不是很清楚.如何使它更清楚?

The text printed using geom_text is not very clear. How can I make it more clear?

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") 

推荐答案

对文本以及箭头使用annotate:

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为数据帧中的每一行数据覆盖文本，而annotate仅将文本绘制一次.正是这种过度绘图导致了粗体的像素化文本.

The reason is that geom_text overplots the text for each row of data in the data frame, whereas annotate plots the text only once. It is this overplotting that causes the bold, pixellated text.

我确定这个问题最近得到了回答.我将尝试查找参考: 最近有人问了类似的问题:

I am sure this question was answered recently. I'll try to find a reference: A similar question was asked recently:

• ggplot2 :是否有针对geom_text()产生的锯齿状，质量较差的文本的修复程序?
• 如何很好地注释ggplot2(手册)

• ggplot2: Is there a fix for jagged, poor-quality text produced by geom_text()?
• How to nicely annotate a ggplot2 (manual)

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