matrixTests (version 0.2.2)

fligner: Fligner-Killeen test

Description

Performs the Fligner-Killeen test of homogeneity of variances (with median centering of the groups) on each row/column of the input matrix.

Usage

row_flignerkilleen(x, g)
col_flignerkilleen(x, g)

Value

a data.frame where each row contains the results of the Fligner-Killeen test performed on the corresponding row/column of x.

Each row contains the following information (in order):

1. obs.tot - total number of observations

2. obs.groups - number of groups

3. df - degrees of freedom

4. statistic - squared statistic

5. pvalue - p-value

Arguments

x

numeric matrix.

g

a vector specifying group membership for each observation of x.

Author

Karolis Koncevičius

Details

NA values are always ommited. If values are missing for a whole group - that group is discarded. Groups with only one observation are also discarded.

row_flignerkilleen(x, g) - Fligner-Killeen test on rows. col_flignerkilleen(x, g) - Fligner-Killeen test on columns.

Results should be the same as as running fligner.test(x, g) on every row (or column) of x.

See Also

fligner.test()

Examples

col_flignerkilleen(iris[,1:4], iris$Species)
row_flignerkilleen(t(iris[,1:4]), iris$Species)