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Last data update: 2014.03.03

R: Simple Estimation of the Intraclass Correlation Coefficient

ICCbare

R Documentation

Simple Estimation of the Intraclass Correlation Coefficient

Description

Estimates the Intraclass Correlation Coefficient (ICC) and is meant to be as simple and fast as possible for use in Monte Carlo simulations or bootstrapping. If the design is balanced, it will calculate variance components 'by hand', instead of using the aov() function.

Usage

ICCbare(x, y, data)

Arguments

`x`	column name indicating individual or group id in the dataframe `data`
`y`	column name indicating measurements in the dataframe `data`. Each entry in `x` must have at least one non-NA value in `y`
`data`	a dataframe containing `x` and `y`

Details

ICCbare can be used on balanced or unbalanced datasets with NAs. ICCbareF is similar, however ICCbareF should not be used with unbalanced datasets.

Value

ICC

the intraclass correlation coefficient

Author(s)

Matthew Wolak matthewwolak@gmail.com