基于列值的R计数天数差

# 创建一个包含日期数据的数据框
dates <- data.frame(start_date = c("2022-01-01", "2022-01-02", "2022-01-03"),
                    end_date = c("2022-01-05", "2022-01-06", "2022-01-07"))

# 将日期数据转换为日期类型
dates$start_date <- as.Date(dates$start_date)
dates$end_date <- as.Date(dates$end_date)

# 计算天数差异
dates$day_diff <- difftime(dates$end_date, dates$start_date, units = "days")

# 打印结果
print(dates)

  start_date   end_date day_diff
1 2022-01-01 2022-01-05   4 days
2 2022-01-02 2022-01-06   4 days
3 2022-01-03 2022-01-07   4 days