使用注释向ggplot2添加粗体女性符号

时间:2016-07-13 14:51:22

标签: r ggplot2 fonts plotmath

我试图在我的情节中使用女性符号♀。它非常微弱(好吧,它在我的实际图形上看起来很微弱),所以我希望能让它变得大胆。

df <- data.frame(x = c(0, 1), y = c(0, 1))
ggplot(df, aes(x, y)) + geom_point() +
   theme_bw() +
   annotate("text", x = 0.5, y = 0.7, label = "2016 ♀", 
   size = 7, hjust = 0, colour = "grey50")

Plot with faint female symbol

我尝试了以下方法,但似乎都没有效果:

ggplot(df, aes(x, y)) + geom_point() +
   annotate("text", x = 0.5, y = 0.7, label = "2016~bold(♀)", 
   size = 7, hjust = 0, parse = TRUE) 

# error message: Error in parse(text = as.character(lab)) : <text>:1:11: unexpected '<'
#1: 2016~bold(<
              ^

ggplot(df, aes(x, y)) + geom_point() +
   annotate("text", x = 0.5, y = 0.7, label = "2016~bold(u2640)", 
   size = 7, hjust = 0, parse = TRUE) 

ggplot(df, aes(x, y)) + geom_point() +
   annotate("text", x = 0.5, y = 0.7, label = "2016~bold(\u2640)", 
   size = 7, hjust = 0, parse = TRUE) 

我还找到this post,但我不确定是否可以修改以下代码以在ggplot中工作?

plot(df)
text( locator(1), "\\VE", vfont=c("sans serif","bold"), xpd=TRUE)  # Venus 

1 个答案:

答案 0 :(得分:5)

@ Axeman的评论帮助我找到答案 - 我没有意识到你可以在其他软件包中加载以获得更多ggplot2的字体。谢谢!我使用了以下代码:

install.packages("extrafont")
library(extrafont)
font_import() # Prepare for this to take several minutes
loadfonts(device = "win")

ggplot(df, aes(x, y)) + geom_point() +
   theme_bw() +
   annotate("text", x = 0.5, y = 0.7, label = "2016 ♀", 
   size = 7, hjust = 0, colour = "grey50", family = "Calibri", fontface = "bold")

enter image description here