rlist (version 0.2.3)

list.count: Count the number of members that meet given condition

Description

Count the number of members that meet given condition

Usage

list.count(.data, cond)

Arguments

.data

list

cond

A logical lambda expression

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)