문제
In R I frequently aggregate daily data (in a zoo
) by month, using something like this:
result <- aggregate(x, as.yearmon, "mean", na.rm=TRUE)
Is there a way that I can do this by week?
해결책
The easiest thing to do is to use the apply.weekly
function from xts
.
> apply.weekly(zoo(1:10, as.Date("2010-01-01") + 1:10), mean)
2010-01-03 2010-01-10 2010-01-11
3 42 10
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