ssmd: Strictly standardised mean difference (SSMD)

In Swarchal/phenoDist: Distance Measurements in Phenotypic Screening

Description

SSMD is a measure of effect size, defined at the mean divided by the standard deviation of a difference between two random values each from one of the two groups.

\frac{β = μ_a - μ_b}{√{σ_a^2 + σ_b^2 - σ_{ab}}}

Beta is defined as the ratio of mean to SD of the two groups.

Usage

ssmd(a, b, verbose = TRUE, ...)

Arguments

a	Vector
b	Vector
verbose	if TRUE will return a description of effect size
...	additional arguments to be passed to mean() or var()

Value

SSMD and effect description if verbose is TRUE

Examples

a <- rnorm(100, 1)
b <- rnorm(100, 10)
ssmd(a, b)

Swarchal/phenoDist documentation built on May 9, 2019, 3:25 p.m.