R 中的空箱线图

Question

我正在尝试使用以下代码绘制箱线图。当我运行它时，我得到 2 个空框，没有情节。这一定是小问题，但我似乎无法修复它。有人可以帮忙吗

抱歉，刚刚将库添加为第一行代码。

这是我的代码：

library(HSAUR3)   
data(schizophrenia2)

layout(matrix(1:2, nrow =1))
ylim <- range(schizophrenia2$month)
Less <- subset(schizophrenia2, onset == "< 20 Years")
More <- subset(schizophrenia2, onset == "> 20 Years")

boxplot(month ~ disorder, data = Less, ylab = "Month",
    xlab = "Disorder", ylim = ylim, main = "Less than 20")

boxplot(month ~ disorder, data = More, ylab = "Month",
    xlab = "Disorder", ylim = ylim, main = "More than 20")

Answer 1

Less <- subset(schizophrenia2, onset == "< 20 yrs")
More <- subset(schizophrenia2, onset == "> 20 yrs")

R 中的空箱线图

Empty boxplot in R

r

boxplot