您可能需要自己提供值。引用在adjbox()
幫助文件中使用的例子:
library(robustbase)
if(require("boot")) {
### Hubert and Vandervieren (2006), p. 10, Fig. 4.
data(coal, package = "boot")
coaldiff <- diff(coal$date)
op <- par(mfrow = c(1,2))
boxplot(coaldiff, main = "Original Boxplot")
adjbox(coaldiff, main = "Adjusted Boxplot")
par(op)
}
這將產生以下箱線圖:
然後你就可以得到所使用的adjbox()
函數的值:
coald <- data.frame(coaldiff = diff(coal$date)) #$
adjboxStats(coald$coaldiff)$stats
# [1] 0.0000000 0.1013005 0.3107461 0.7529090 3.7180014
這些是用來繪製調整箱線圖的值。您可以使用此信息提供給ggplot()
,然後計算您自己的箱型圖。可能有這樣做的更好的方法,但是,我認爲做的第一件事就是做一個新的數據集,包括調整後箱線圖值:
library(ggplot2)
library(plyr)
d <- ddply(coald, .(coaldiff), transform,
ymin = adjboxStats(coald$coaldiff)$stats[1],
ymax = adjboxStats(coald$coaldiff)$stats[5],
middle = adjboxStats(coald$coaldiff)$stats[3],
lower = adjboxStats(coald$coaldiff)$stats[2],
upper = adjboxStats(coald$coaldiff)$stats[4])
# Boxplot with unadjusted values:
p <- ggplot(d, aes(factor(1), coaldiff))
p + geom_boxplot()
# Boxplot with adjusted values (note that you have to add the outliers back in):
p + geom_boxplot(aes(ymin=ymin, ymax=ymax, middle=middle, upper=upper, lower=lower),
stat="identity") +
geom_point(data=subset(d, coaldiff < ymin | coaldiff > ymax))
這會給你ggplot2
版本上述地塊:
還要注意的是哈德利韋翰建議對這種「無花了很多心思」在response到類似的問題。