functions available for use with aggregate?
1. There is also "aggregate.zoo" in the "zoo" package. 2. If your question is which functions can be used for the "FUN" argument, you can write your own. For example: > set.seed(1) > tstDF <- data.frame(x=rep(1:4, e=2), + y=rnorm(8)) > aggregate(tstDF[2], tstDF[1], + function(z)max(z)/min(z)) x y 1 1 -0.2931474 2 2 -1.9090787 3 3 -0.4016093 4 4 1.5147327 > spencer graves
Sundar Dorai-Raj wrote:
t c wrote:
What are the functions available for use with ?aggregate?? Where can a reference to them be found?
Since aggregate is a S3 generic, you can use methods(aggregate) to see what objects have an "aggregate" method. For me, I have the following:
> methods(aggregate)
[1] aggregate.data.frame aggregate.default aggregate.frm*
[4] aggregate.ts
Non-visible functions are asterisked
>
See ?methods for more details. HTH, --sundar
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