list.common: Get all common cases by expression for a list

In rlist: A Toolbox for Non-Tabular Data Manipulation

Description

Get all common cases by expression for a list

Usage

list.common(.data, expr)

Arguments

.data	list
expr	An anonymous (or "lambda") expression to determine common cases. If one is not specified, list.common simply returns all identical sub-elements within lists.

Examples

x <- list(c('a','b','c'),c('a','b'),c('b','c'))
list.common(x, .)
x <- list(p1 = list(type='A',score=list(c1=10,c2=8)),
       p2 = list(type='B',score=list(c1=9,c2=9)),
       p3 = list(type='B',score=list(c1=9,c2=7)))
list.common(x,type)
list.common(x,names(score))

foo <- list(x = LETTERS[1:3], y = LETTERS[3:5])
list.common(foo)

Example output

[1] "b"
character(0)
[1] "c1" "c2"
[1] "C"

rlist documentation built on Sept. 5, 2021, 5:30 p.m.