如何根据R中的多个条件定义一个新的数据框列？

# 安装并加载dplyr包
install.packages("dplyr")
library(dplyr)

# 创建一个示例数据框
data <- data.frame(
  A = c(1, 2, 3, 4, 5),
  B = c(10, 20, 30, 40, 50),
  C = c("a", "b", "c", "d", "e")
)

# 根据多个条件定义一个新的数据框列
data <- data %>%
  mutate(new_column = case_when(
    A > 2 & B < 40 ~ "Condition1",
    A == 1 & C == "a" ~ "Condition2",
    TRUE ~ "Other"
  ))

# 查看结果
print(data)

   A  B C    new_column
1  1 10 a     Condition2
2  2 20 b        Other
3  3 30 c     Condition1
4  4 40 d        Other
5  5 50 e        Other