Year month to semester, quarter, trimester
Usage
ym_div(ym = format(ymd(20170101) + months(0:11), "%Y%m"), ng = 4)
Arguments
- ym
ym
- ng
number of groups
ym_seq(201303, 201512)
seqym <- ym_seq(201303, 201512)
seqym
ym_div(seqym, ng = 3)
ym_div(seqym, ng = 4)