[Rd] Aggregate factor names

Mike Lawrence
2007-09-27T15:57:55Z

Hi all,

A suggestion derived from discussions amongst a number of R users in
my research group: set the default column names produced by aggregate
() equal to the names of the objects in the list passed to the 'by'
object.

ex. it is annoying to type

with(
	my.data
	,aggregate(
		my.dv
		,list(
			one.iv = one.iv
			,another.iv = another.iv
			,yet.another.iv = yet.another.iv
		)
		,some.function
	)
)

to yield a data frame with names = c
('one.iv','another.iv','yet.another.iv','x')
when this seems more
economical:

with(
	my.data
	,aggregate(
		my.dv
		,list(
			one.iv
			,another.iv
			,yet.another.iv
		)
		,some.function
	)
)

--
Mike Lawrence
Graduate Student, Department of Psychology, Dalhousie University

Website: http://memetic.ca

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Err and err and err again, but less and less and less."
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