box_m | R Documentation |
Performs the Box's M-test for homogeneity of covariance matrices obtained from multivariate normal data according to one grouping variable. The test is based on the chi-square approximation.
box_m(data, group)
data |
a numeric data.frame or matrix containing n observations of p variables; it is expected that n > p. |
group |
a vector of length n containing the class of each observation; it is usually a factor. |
A data frame containing the following components:
statistic an approximated value of the chi-square distribution.
parameter the degrees of freedom related of the test statistic in this case that it follows a Chi-square distribution.
p.value the p-value of the test.
method the character string "Box's M-test for Homogeneity of Covariance Matrices".
data(iris) box_m(iris[, -5], iris[, 5])
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