Hello all,
I have a dataframe that looks like this:
head(df)
date y
1 2010-09-27 1356
2 2010-10-04 1968
3 2010-10-11 2602
4 2010-10-17 3116
5 2010-10-24 3496
6 2010-10-31 3958
I need a function that, given any date, returns the y value
corresponding to the given date or the last day before the given date.
Example:
Input: as.Date("2010-10-06"). Output: 1968 (because the last value is
from 2010-10-04)
I've been tinkering with this for an hour now, without success. I
think the solution is either surprisingly complicated or surprisingly
simple.
Thanks,
robert
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