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amp
2009 Oct 10
2
Matching Dates Closest without going over
...14466, 14453, 14441, 14396, 14388,
14343, 14333, 14310, 14281), class = "Date")
I would like to create another dataframe with columns d1 and d2, where d1 is
the original d1 and d2 is the max(d2) such that d1 > d2. And NA's where not
applicable.
(See desired result below)
Thanks,
Ampy
d1
2009-10-09
2009-09-08
2009-08-08
2009-07-08
2009-06-07
2009-05-07
2009-04-06
2009-03-06
2009-02-03
2009-01-03
2008-12-03
2008-11-02
d2
2009-10-09
2009-09-22
2009-09-01
2009-08-10
2009-07-28
2009-07-16
2009-06-01
2009-05-24
2009-04-09
2009-03-30
2009-03-07
2009-02-06
result:
d1...