MauchlySphericityTest: Mauchly's test of Sphericity

Description Usage Arguments Value References Examples

View source: R/testMauchlySphericity.R

Description

Performs a test of sphericity on a dataframe with multiple measures, one subject per line. It assesses the significance of the null hypothesis that the covariance matrix is spherical. This test is described in \insertCitea10superb

Usage

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Arguments

dta

A data frame containing within-subject measures, one participant per line;

cols

A vector indicating the columns containing the measures.

Value

p the p-value of the null hypothesis that the data are spherical.

References

\insertAllCited

Examples

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# creates a small data frames with 4 subject's scores for 5 measures:
dta <- data.frame(cbind(
        col1 <- c(3., 6., 2., 2., 5.),
        col2 <- c(4., 5., 4., 4., 3.),
        col3 <- c(2., 7., 7., 8., 6.),
        col4 <- c(6., 8., 4., 6., 5.)
    ))
# performs the test (here p = 0.5824)
MauchlySphericityTest(dta)

superb documentation built on April 22, 2021, 1:06 a.m.