6
我想將圖例標題sex
稍微向右移動到圖例框的水平中心。我試過theme
和guide_legend
但失敗。這兩種方式都不會改變圖例的標題位置。如何將圖例標題與ggplot2中的圖例框對齊?
# example data from http://www.cookbook-r.com/Graphs/Legends_(ggplot2)/
df1 <- data.frame(
sex = factor(c("Female","Female","Male","Male")),
time = factor(c("Lunch","Dinner","Lunch","Dinner"), levels=c("Lunch","Dinner")),
total_bill = c(13.53, 16.81, 16.24, 17.42)
)
library(ggplot2)
p <- ggplot(data=df1, aes(x=time, y=total_bill, group=sex, shape=sex, colour=sex)) +
geom_line() + geom_point()
# no change
p + theme(legend.title = element_text(hjust = 0.5))
p + guides(color=guide_legend(title.hjust=0.5))
另外,我使用的是ggplot2_2.2.0。
謝謝。這解決了我的問題。 – mt1022
顯然這不適用於[long legend titles。](https://stackoverflow.com/questions/48000292/center-align-legend-title-and-legend-keys-in-ggplot2-for-long-legend -titles) –