logmean: Logarithmic mean of two numbers

In matsbyname: An Implementation of Matrix Mathematics that Respects Row and Column Names

Logarithmic mean of two numbers

Description

Calculates the logarithmic mean of two numbers.

Usage

logmean(a, b, base = exp(1))

Arguments

a	the first operand (must be non-negative)
b	the second operand (must be non-negative)
base	the base of the logarithm used in this calculation. (Default is exp(1).)

Details

This is an internal helper function for logarithmicmean_byname.

Value

0 if a = 0 or b = 0; x1 if a == b; and (a - b) / log(a/b, base = base) for all other values of a and b

Examples

matsbyname:::logmean(0, 0) # 0
matsbyname:::logmean(0, 1) # 0
matsbyname:::logmean(1, 0) # 0
matsbyname:::logmean(1, 1) # 1
matsbyname:::logmean(2, 1)
matsbyname:::logmean(1, 2) # commutative
matsbyname:::logmean(1, 10) # base = exp(1), the default
matsbyname:::logmean(1, 10, base = 10)

matsbyname documentation built on Oct. 19, 2023, 5:11 p.m.