collapse (version 2.1.1)

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

Description

rapply2d is a recursive version of lapply with three differences to rapply:

1. data frames (or other list-based objects specified in classes) are considered as atomic, not as (sub-)lists

2. FUN is applied to all 'atomic' objects in the nested list

3. the result is not simplified / unlisted.

Usage

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

Value

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

Arguments

l

a list.

FUN

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

...

additional elements passed to FUN.

classes

character. Classes of list-based objects inside l that should be considered as atomic.

See Also

rsplit, unlist2d, List Processing, Collapse Overview

Examples

l <- list(mtcars, list(mtcars, as.matrix(mtcars)))
rapply2d(l, fmean)
unlist2d(rapply2d(l, fmean))