Function over grouping variables (window function)
This is faster version of ave. window_fun applies function
to every subset of x and return vector of the same length as x.
window_fun(x, ...)
x |
A vector |
... |
Grouping variables all of the same length as x or length 1 and function as last argument. |
vector of the same length as x
window_fun(1:3, mean) # no grouping -> grand mean attach(warpbreaks) window_fun(breaks, wool, mean) window_fun(breaks, tension, function(x) mean(x, trim = 0.1)) detach(warpbreaks)
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