java日期计算 季度_在开始日期和结束日期内生成季度，并计算每个季度内的天数...

我是R的新手并且有一个问题，希望有人会知道答案 .

我有一个(小样本)数据集，如下所示：

structure(list(ID = 1:6, Date_Start = structure(c(7305, 7702,

12114, 9714, 11819, 8418), class = "Date"), Date_stop = structure(c(10957,

11355, 15767, 10111, 17422, 12949), class = "Date"), Start_Range_1 = structure(c(7731,

8068, 13304, 9863, NA, NA), class = "Date"), Stop_Range_1 = structure(c(8129,

8070, 13308, 9867, NA, NA), class = "Date"), Days_Range_1 = structure(c(3L,

2L, 4L, 4L, 1L, 1L), .Label = c("#VALUE!", "2", "398", "4"), class = "factor"),

Start_Range_2 = structure(c(8170, 8566, 13878, NA, 11853,

NA), class = "Date"), Stop_Range_2 = structure(c(8202, 8593,

13893, NA, 12072, NA), class = "Date"), Days_Range_2 = structure(c(5L,

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