我想计算每组5天内的累计总和。
df <- data.frame(
date = ymd( c( "2022-01-02","2022-01-03","2022-01-05","2022-01-07","2022-01-11","2022-01-14","2022-01-17","2022-01-18","2022-01-24","2022-01-27","2022-01-01","2022-01-04","2022-01-04","2022-01-08","2022-01-12","2022-01-14","2022-01-19","2022-01-24","2022-01-25","2022-01-28")),
group = c("A","A","A","A","A","A","A","A","A","A","B","B","B","B","B","B","B","B","B","B"),
number = c(10,30,20,50,30,50,40,50,30,50,55,10,30,20,50,30,40,30,40,30))
下面是我的数据框的一个小样本，包括累积总和列应返回的内容。任何帮助，将不胜感激。谢谢。
date group number cumsum(s)
2022-01-02 A 10 10
2022-01-03 A 30 40
2022-01-05 A 20 60
2022-01-07 A 50 110
2022-01-11 A 30 80
2022-01-14 A 50 80
2022-01-17 A 40 90
2022-01-18 A 50 140
2022-01-24 A 30 30
2022-01-27 A 50 80
2022-01-01 B 55 55
2022-01-04 B 10 65
2022-01-04 B 30 95
2022-01-08 B 20 60
2022-01-12 B 50 70 …