R添加新列，并根据多个条件使用字符串值填充该列

# 创建一个示例数据框
data <- data.frame(
  id = c(1, 2, 3, 4, 5),
  condition1 = c("A", "B", "C", "A", "B"),
  condition2 = c("X", "Y", "Z", "X", "Y")
)

# 添加新列并根据多个条件使用字符串值填充该列
data$new_column <- ifelse(data$condition1 == "A" & data$condition2 == "X", "Value1",
                          ifelse(data$condition1 == "B" & data$condition2 == "Y", "Value2",
                                 ifelse(data$condition1 == "C" & data$condition2 == "Z", "Value3", "Other")))

# 打印结果
print(data)