smsets (version 2.0.0)

print.Levenetestsms.mv: Prints multiple Levene's tests of multivariate data.

Description

Prints the results produced by Levenetestsms.mv, consisting of m-sample Levene's tests computed from one-way ANOVAs applied to absolute differences around medians for p responses. It optionally produces a single multivariate Levene's test which is basically a one-way MANOVA of absolute differences around medians.

Usage

# S3 method for Levenetestsms.mv
print(
  x,
  format = "oneway.test",
  EffectSize = TRUE,
  multivariate = FALSE,
  mv_statistic = c("Pillai", "Wilks", "Hotelling-Lawley", "Roy"),
  long = FALSE,
  ...
)

Value

An annotated output of m-sample Levene's tests computed from one-way ANOVAs applied to absolute differences around medians for p responses, with (optionally) corrected significance levels. The argument x, invisibly, as for all print methods, is a list of class "Levenetestsms.mv". This print method provides a user-friendly display of particular elements in x:

• A description of the analysis.

• The data frame analyzed

• The labels of the group factor with m levels (samples).

• The univariate Levene's tests based on the results of one-way ANOVAs for each response variable; These results consist of the F-tests displayed in up to two different output formats corresponding to the formatted results produced by the conventional functions oneway.test and anova.lm. P-values are recomputed whenever P.adjust method is different from "none".

In addition to the above information, the long = TRUE output lists:

• Sample medians classified by group levels and variables.

• Means and variances of sample absolute deviations from the median classified by group levels and variables.

If multivariate = TRUE, the multivariate Levene's test is appended, based on the test statistic specified in mv_statistic. If multivariate = TRUE and mv_statistic is omitted, Pillai's statistic is chosen by default.

Arguments

x

an object of class "Levenetestsms.mv".

format

a character string specifying the one-way ANOVA results are formatted, must be one of "oneway.test" (default), "anova.lm" or "both".

EffectSize

a logical variable. If TRUE (default), the measures of effect size \(\eta^2\), \(\omega^2\), \(\epsilon^2\), and Cohen's f are returned.

multivariate

a logical variable. If TRUE, the multivariate Levene's test is returned. The test statistic chosen can be set with the optional argument mv_statistic.

mv_statistic

a character string. The name of the test statistic to be used in the multivariate Levene's test (any of the four tests implemented in summary.manova). Pillai's test is the default. Partial matching is used so the name can be abbreviated.

long

A logical variable indicating whether a long output is desired (TRUE) or not (FALSE, the default). The additional objects returned are three matrices: 1) matrix of medians for the original data classified by sample and response variable, 2) matrix of mean absolute deviations around means, and 3) matrix of variances of absolute deviations around means.

...

further arguments passed to or from other methods.

Examples

data(skulls)
res.Levenems.mv <- Levenetestsms.mv(skulls, Period, var.equal = TRUE,
                                    P.adjust = "bonferroni")
print(res.Levenems.mv, format = "both", multivariate = TRUE, long = TRUE)