r - 为什么这个格子条形图包装器不起作用？

Question

我正在尝试像这样制作格子条形图函数的包装器（默认情况下使用 ggplot 主题）：

require(ggplot2)
require(lattice)
require(latticeExtra)
data(Titanic)
mytheme = ggplot2like()
gbarchart = function(...) {
    barchart(..., par.settings=mytheme)
}
gbarchart(Class ~ Freq | Sex + Age,
          as.data.frame(Titanic),
          groups = Survived,
          stack = TRUE,
          layout = c(4, 1),
          auto.key = list(title = "Survived", columns = 2),
          scales = list(x = "free"))

它给出了一个错误：

Error in eval(expr, envir, enclos) : 
  ..3 used in an incorrect context, no ... to look in

如果直接par.settings=mytheme添加barchart，它可以工作：

barchart(Class ~ Freq | Sex + Age,
          as.data.frame(Titanic),
          groups = Survived,
          stack = TRUE,
          layout = c(4, 1),
          auto.key = list(title = "Survived", columns = 2),
          scales = list(x = "free"),
          par.settings=mytheme)

Answer 1

Barchart 期待单独的论点，而不是配对列表。我会做这样的事情：

gbarchart = function(...) {
  args <- as.list(match.call()[-1])
  args$par.settings=mytheme
  do.call(barchart,args)
}