使用构面

时间:2017-07-01 04:43:17

标签: r ggplot2 geom-text

我有一个数据框,在5种中每种都有10个值,有2种类型。

df <- data.frame(x2=rnorm(100),y2=rnorm(100), type = c(rep("type a", 50), rep("type b", 50)), kind = rep(LETTERS[1:5],10))

我想打印每个象限中百分比值的标签。我目前的代码是:

ggplot(df, aes(x2, y2)) + geom_point() +
  geom_vline(xintercept = 0) +
  geom_hline(yintercept = 0) +
  geom_text(data = df, aes(x2, y2, label = "")) +
  facet_grid(type~kind)

当前输出:enter image description here

预期输出(例如,我显示了类型a的A类和B类的百分比,我想绘制所有种类和类型的百分比值):enter image description here

任何建议都会很棒。谢谢!

1 个答案:

答案 0 :(得分:4)

你可能需要计算ggplot2之外的比例,

library(dplyr)
numbers <- df %>% group_by(type,kind) %>% mutate(cases = n()) %>% 
  add_count(x2>0,y2>0) %>% mutate(label=paste(round(n/cases*100),"%"), 
                                  x = ifelse(`x2 > 0`, Inf, -Inf), 
                                  y = ifelse(`y2 > 0`, Inf, -Inf), 
                                  hjust = ifelse(`x2 > 0`, 1, 0), 
                                  vjust = ifelse(`y2 > 0`, 1, 0))

ggplot(df, aes(x2, y2)) + geom_point() +
  geom_vline(xintercept = 0) +
  geom_hline(yintercept = 0) +
  facet_grid(type~kind) +
  geom_label(data=numbers, aes(label = label, x=x, y=y, vjust=vjust, hjust = hjust))