Gabor,
This is great. Thank you. It runs in just 3 seconds.
Brian
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I don't know if this is any faster but it does not use any loops or apply
so maybe it is. x is assumed to be a vector chron dates. Note that
the question is not well specified for days near the end of the month
and I have not addressed that.
with(month.day.year(x), {
year <- ifelse(month
I have a vector of over 7,000 chron dates in the format "mm/dd/yy". I need
to increment each date in the vector by a standard number of months.
Lapply with seq.dates is working OK; this increments the vector x by 3
months:
dates(unlist(lapply(x, function(g) seq.dates(g, by="months", length=4)[4])
