On 13-12-15 6:43 AM, 水静流深 wrote:
seq(as.Date("2001/1/1"),as.Date("2010/1/1"),"years")
seq(as.Date("2001/1/1"),as.Date("2010/1/1"),"weeks")
seq(as.Date("2001/1/1"),as.Date("2010/1/1"),"days")
why there is no
seq(as.Date("2001/1/1"),as.Date("2010/1/1"),"quarters") ?
There's no need for it. Just use months, and take every 3rd one:
x <- seq(as.Date("2001/1/1"),as.Date("2010/1/1"),"months")
x[seq_along(x) %% 3 == 1]
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