R語言中自編函數（例題）
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mystats <- function(x, parametric = TRUE, print = FALSE){ if (parametric) { center = mean(x); spread = sd(x) }else { center <- median(x); spread = mad(x) } if (print & parametric) { cat("Mean = ", center, "\n","\bSD = ", spread, "\n") }else if (print & !parametric) { cat("Median = ", center, "\n", "\bMAD = ", spread,"\n") } result <- list(center = center, spread = spread) return(result) } x <- 1:5 mystats(x) mystats(x,parametric = T,print = T) mystats(x, parametric = F, print = T)
