list.count: Count the number of elements that satisfy given condition
In renkun-ken/rlist: A Toolbox for Non-Tabular Data Manipulation

list.count

R Documentation

Count the number of elements that satisfy given condition

Description

Count the number of elements that satisfy given condition

Usage

list.count(.data, cond)

Arguments

`.data`	A `list` or `vector`
`cond`	A logical lambda expression for each element of `.data` to evaluate. If `cond` is missing then the total number of elements in `.data` will be returned.

Value

An integer that indicates the number of elements with which cond is evaluated to be TRUE.

Examples

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.count(x, type=='B')
list.count(x, min(unlist(score)) >= 9)

renkun-ken/rlist documentation built on March 16, 2023, 8:25 p.m.