| bartlett {matrixTests} | R Documentation |
Bartlett test
Description
Performs the Bartlett's test of homogeneity of variances on each row/column of the input matrix.
Usage
row_bartlett(x, g)
col_bartlett(x, g)
Arguments
x |
numeric matrix. |
g |
a vector specifying group membership for each observation of x. |
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_bartlett(x, g) - Bartlet's test on rows.
col_bartlett(x, g) - Bartlet's test on columns.
Results should be the same as as running bartlett.test(x, g)
on every row (or column) of x.
Value
a data.frame where each row contains the results of the bartlett 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. var.pooled - pooled variance estimate
4. df - degrees of freedom
5. statistic - chi-squared statistic
6. pvalue - p-value
Author(s)
Karolis Koncevičius
See Also
bartlett.test()
Examples
col_bartlett(iris[,1:4], iris$Species)
row_bartlett(t(iris[,1:4]), iris$Species)