true_range_n: True Range of Numeric Values

In dvmisc: Faster Computation of Common Statistics and Miscellaneous Functions

Description

Defined as the difference between the maximum and the minimum. Equivalent to base R code diff(range(x)), but much faster. For integer objects, true_range_i should run even faster.

Usage

true_range_n(x)

Arguments

x	Numeric vector or matrix.

Value

Numeric value.

Examples

# In general, true_range_n is much faster than diff(range(x))
x <- rnorm(1000)
all.equal(diff(range(x)), true_range_n(x))
benchmark(diff(range(x)), true_range_n(x), replications = 5000)

# For integer vectors, true_range_i should be even faster
x <- rpois(1000, lambda = 5)
all.equal(diff(range(x)), true_range_i(x))
benchmark(diff(range(x)), true_range_n(x), true_range_i(x), 
          replications = 5000)

dvmisc documentation built on May 2, 2019, 5:51 p.m.