itertools2 (version 0.1.1)

quantify: Count the number of times an iterable object is TRUE

Description

Returns the number of elements from an iterable object evaluate to TRUE.

Usage

quantify(object)

Arguments

object

an iterable object

Value

the number of TRUE elements

Examples

it <- iterators::iter(c(TRUE, FALSE, TRUE))
quantify(it) # 2

set.seed(42)
x <- sample(c(TRUE, FALSE), size=10, replace=TRUE)
quantify(x) # Equivalent to sum(x)