[R] best way to apply a list of functions to a dataset ?
Hadley Wickham
hadley at rice.edu
Wed Jul 21 17:00:40 CEST 2010
> ddply(ma, .(variable), summarise, mean = mean(value), sd = sd(value),
> skewness = skewness(value), median = median(value),
> mean.gt.med = mean.gt.med(value))
In principle, you should be able to do:
ddply(ma, .(variable), colwise(each(mean, sd, skewness, median, mean.gt.med)))
but currently colwise and each don't work together that well.
Hadley
--
Assistant Professor / Dobelman Family Junior Chair
Department of Statistics / Rice University
http://had.co.nz/
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