如何我可以用顏色特定數據條中的R直方圖

Question

如果我有一個直方圖：

> hist(faithful$waiting,seq(min(faithful$waiting),max(faithful$waiting))) 

和「特殊」的頻率列表：

> c(51, 52, 57, 59, 64) 

是有可能顏色對應的條到這些特殊的頻率與組織塊的其餘部分不同的顏色？

Answer 1

您可以簡單地創建顏色矢量並使用col選項。

data(faithful) 

# make sure frequencies in order and unique for the histogram call 
special <- ifelse(sort(unique(faithful$waiting)) %in% c(51, 52, 57, 59, 64), "red", "white") 

# same call with the 'col' option 
hist(faithful$waiting,seq(min(faithful$waiting),max(faithful$waiting)), col=special) 

Answer 2

樂趣GGPLOT2 ...

faithful$special <- faithful$waiting %in% c(51, 52, 57, 59, 64) 

library(ggplot2) 

ggplot(data = faithful, aes(x = waiting, fill = special)) + 
    geom_histogram(binwidth = 1, colour = 'white')