geom_col上的n和百分号标签，ggplot2

Question

如果我使用下面的代码绘制df，我可以将每列的n放在列本身as seen in this example plot上。我想做的还是在标签中列出每列的百分比。这是该列组成的总数的百分比。因此，例如，第一列上的标签将显示为127(42.9%)，而不仅仅是127。我怎么能这样做？

df <- structure(list(Letter = structure(1:7,
      .Label = c("A", "B", "C", "D", "E", "F", "G"),
      class = "factor"), Freq = c(127L, 101L, 24L, 19L, 3L, 0L, 22L)),
      .Names = c("Letter", "Freq"),
      row.names = c(NA, -7L),
      class = "data.frame")

ggplot(df, aes(Letter, Freq, label = Freq)) +
  geom_col() +
  geom_text(size = 3, position = position_dodge(width = 1), vjust = -0.25)

Answer 1

只需创建要用作标签的文字。

set JAVA_HOME -> C:\Program Files\Java\jdk1.8.0_151\bin