我有这个数据框:
set.seed(50)
data <- data.frame(age=c(rep("juv", 10), rep("ad", 10)),
sex=c(rep("m", 10), rep("f", 10)),
size=c(rep("large", 10), rep("small", 10)),
length=rnorm(20),
width=rnorm(20),
height=rnorm(20))
age sex size length width height
1 juv m large 0.54966989 -0.34992735 0.10955641
2 juv m large -0.84160374 -0.58689714 -0.41341885
3 juv m large 0.03299794 -1.58987765 0.11179591
4 juv m large 0.52414971 1.68955955 -2.89232140
5 juv m large -1.72760411 0.56358364 0.09534935
6 juv m large -0.27786453 2.66763339 0.49988990
7 juv m large 0.36082844 0.35653495 0.94937215
8 juv m large -0.59091244 -0.36212039 -1.65840096
9 juv m large 0.97559055 0.56874633 -1.48161964
10 juv m large -1.44574995 0.02867454 -0.49068623
11 ad f small 0.29520677 0.19902339 0.01475390
12 ad f small 0.55475223 -0.85142228 0.33763747
13 ad f small -0.49863554 -1.13044947 -1.96590570
14 ad f small 0.19573384 0.59724896 -2.32077461
15 ad f small -0.45554055 -1.09604786 0.99581082
16 ad f small -0.36285547 0.01909655 1.16695158
17 ad f small -0.15681338 0.41619898 -0.86517483
18 ad f small -0.76525139 1.83967570 -1.39094651
19 ad f small -1.16601736 0.40618657 -1.33263085
20 ad f small -0.32342568 0.39322175 -0.13883976
通过调用一个函数,我想制作每个的箱线图length
,width
并height
针对每个级别age
,sex
和size
。所以输出应该是 9 个不同的图(并且 9 个图中的每一个都应该包含每个级别的 2 个“框”。
我试过这个功能:
exploreBoxplots <- function (dataframe, x.variables, y.variables) {
library(plyr); library(ggplot2)
xVariables <- list(x.variables)
yVariables <- list(y.variables)
llply(xVariables, function(x) ggplot(dataframe, aes(x, yVariables)) +
geom_boxplot())
}
exploreBoxplots(data,c(data$age, data$sex, data$size), c(data$length, data$width, data$height))
...但这给出了一个错误。我怎样才能获得这个功能来制作 9 个箱线图?