R help - Oct 2005 - functions available for use with aggregate?

What are the functions available for use with “aggregate”?  Where can a
reference to them be found?

 

 

		
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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

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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-- 
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