> The help page describes the first argument x as a numeric...
It also describes the _value_ as numeric. One for the help page issue list?
In fact there seems no obvious reason for a hard restriction to numeric*; the
return value will depend largely on what FUN does, as there's no argument class
check in the code for ave or for split(), which ave()uses. The principal
requirement is presumably that FUN must accept a vector of class class(x) and
return a vector of the same length as its argument (or, if there's grouping, a
scalar) that split<- (or, with no grouping factor, '<-') can use.
*though plenty of reason to warn of unexpected consequences if not, of course
S Ellison
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