collapse (version 1.7.5)

rapply2d: Recursively Apply a Function to a List of Data Objects

Description

rapply2d is a recursive version of lapply with two key differences to rapply: (1) Data frames are considered as final objects, not as (sub-)lists, and (2) the result is never simplified / unlisted.

Usage

rapply2d(l, FUN, …, classes = "data.frame")

Arguments

l

a list.

FUN

a function that can be applied to all elements in l.

…

additional elements passed to FUN.

classes

character. These are classes of list-based objects inside l which FUN should be applied to. Note that FUN is also applied to all non-list elements in l. It is thus quite different from the classes argument to rapply.

Value

A list of the same structure as l, where FUN was applied to all final (atomic) elements and list-based objects of a class included in classes.

See Also

rsplit, unlist2d, List Processing, Collapse Overview

Examples

# NOT RUN {
l <- list(mtcars, list(mtcars, as.matrix(mtcars)))
rapply2d(l, fmean)
unlist2d(rapply2d(l, fmean))
# }