cohensD: Cohen's D

In LionelRohner/LRTools: A collection of functions written for analyzing Illumina HM450 and EPIC data

Description

This function calculates Cohen's D, an effect size measure. If sample sizes are not equal use the unbiased modifier.

Usage

cohensD(meanA, meanB, sdA, sdB, nA, nB, unbiased = F, verbose = F)

Arguments

meanA	Mean of Group A
meanB	Mean of Group B
sdA	SD of Group A
sdB	SD of Group B
nA	Sample size of Group A
nB	Sample size of Group B
unbiased	If set to FALSE the sample size will be assumed to be equal
verbose	Extra printed information

Value

Cohen's D

Examples

GroupA <- rnorm(1000,10, 2)
GroupB <- rnorm(1000,20, 4)

meanGroupA <- mean(GroupA)
meanGroupB <- mean(GroupB)

sigmaGroupA <- sd(GroupA)
sigmaGroupB <- sd(GroupB)

cohensD(meanA = meanGroupA,
        meanB = meanGroupB,
        sdA = sigmaGroupA,
        sdB = sigmaGroupB,
        nA = 1000, nB = 1000,
        unbiased = TRUE,
        verbose = TRUE)

LionelRohner/LRTools documentation built on Dec. 17, 2021, 1:10 a.m.