Description Usage Arguments Examples
Simple generalized alternative to rollapply
in package
zoo
with the advantage that it works on any type of data
structure (vector, list, matrix, etc) instead of requiring a zoo
object.
1 |
data |
any |
fun |
the function to evaluate |
window |
window width defining the size of the subset available to the fun at any given point |
minimum |
minimum width of the window. Will not return results if the window is truncated below this value at the end of the data set |
align |
whether to align the window right or left |
... |
additional arguments to pass to |
1 2 3 4 5 6 7 8 9 10 | rollApply(1:100,sum,minimum=2,window=2)
rollApply(c(1,2,3),sum)
##6 5 3
rollApply(c(1,2,3,4,5,6,7,8,9),sum)
##45 44 42 39 35 30 24 17 9
rollApply(c(1,2,3,4,5,6,7,8,9),sum,window=2)
##3 5 7 9 11 13 15 17 9
rollApply(list(1,2,3,4,5,6,7,8,9),function(x) sum(unlist(x)),window=2,minimum=2)
##3 5 7 9 11 13 15 17
cbind(women,Rolling3=rollApply(women,fun=function(x) mean(x$weight),window=3,align='right'))
|
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