update.list: Update the elements of a list

Description Usage Arguments Value Note Author(s) See Also Examples

View source: R/update.list.R

Description

Function to update the elements of a list to contain all of the named elements of a new list, overwriting elements with the same name, and (optionally) copying unnamed elements.

Usage

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## S3 method for class 'list'
update(object,
       new,
       unnamed=FALSE,
       ...)

Arguments

object

Object to be updated.

new

List or dataframe containing new elements.

unnamed

Logical. If TRUE, unnamed elements of new will be appended to object.

...

optional method arguments (ignored)

Value

A new list constructed from the elements of object by merging the elements of old and new with named items of new replacing the corresponding elements of old. Unnamed elements of new will be appened unless unnamed=FALSE.

Note

This method can be called directly, or as via the S3 base method for update.

Author(s)

Gregory R. Warnes [email protected]

See Also

update, merge

Examples

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old <- list(a=1,b="red",c=1.37)
new <- list(b="green",c=2.4)

update(old, new)
update.list(old,new)  # equivalent

older <- list(a=0, b="orange", 4, 5, 6)
newer <- list(b="purple", 7, 8, 9)
update(older, newer)               # ignores unnamed elements of newer
update(older, newer, unnamed=TRUE) # appends unnamed elements of newer

gdata documentation built on June 6, 2017, 3 a.m.