| subsetBy(doBy) | R Documentation |
Finds subsets of a dataframe which is split by variables in a formula.
Description
A data frame is split by a formula into groups. Then subsets are found within each group, and the result is collected into a data frame.
Usage
subsetBy(formula, subset, data = parent.frame(), select, drop=FALSE, join=TRUE, ... )
Arguments
formula |
A formula to split by |
subset |
logical expression indicating elements or rows to keep: missing values are taken as false. |
data |
A data frame |
select |
expression, indicating columns to select from a data frame. |
drop |
passed on to [ indexing operator. |
join |
If FALSE the result is a list of data frames (as defined by 'formula'); if TRUE one data frame is returned. |
... |
further arguments to be passed to or from other methods. |
Value
A data frame.
Author(s)
Søren Højsgaard, [email protected]
See Also
See Also splitBy
Examples
data(dietox) subsetBy(~Evit, Weight < mean(Weight), data=dietox)
[Package doBy version 2.1 Index]