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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