[datatable-help] using functions which return a vector

[Matt Pocernich]

Hello,

Sorry for the simple question, but how do I use a function, such as quantile, which returns multiple values.

For example,

data(iris)
IRIS  <- as.data.table(iris)
IRIS[, quantile(Sepal.Length), by = Species]

## returns the following.
       Species    V1
 1:     setosa 4.300
 2:     setosa 4.800
 3:     setosa 5.000
 4:     setosa 5.200
 5:     setosa 5.800
 6: versicolor 4.900
 7: versicolor 5.600
 8: versicolor 5.900
....

I would like the values returned as columns or a vector with the column names returned by the quantile function.

Thanks,

Matt
 		 	   		  
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