期中6

data <- read.csv("C:/Users/wenzao/Downloads/table1_1.csv")


if ("Japanese" %in% colnames(data)) {

  stem(data$Japanese)
} else {
  print("找不到 Japanese 欄位，請確認檔案內容是否正確。")
}

## 
##   The decimal point is 1 digit(s) to the right of the |
## 
##   4 | 9
##   5 | 139
##   6 | 13
##   7 | 9
##   8 | 49
##   9 | 1