hovBF

0th

Percentile

Homogeneity of Variance: Brown--Forsyth method

Homogeneity of Variance: Brown--Forsyth method

Keywords
dplot
Usage
hovBF(x, data = sys.parent(), ..., na.rm = TRUE)
hovplotBF(x, data, ..., na.rm = TRUE,
          main = "Brown-Forsyth Homogeneity of Variance", plotmath = TRUE)
Arguments
x

Model formula with one response variable and one factor.

data

data.frame

Other arguments. hovplotBF sends them on to the panel function. hovBF ignores them.

na.rm

A logical value indicating whether 'NA' values should be stripped before the computation proceeds. See median.

main

main title for the plot.

plotmath

Logical. When TRUE (the default) the strip labels use plotmath. When FALSE the strip labels use ASCII.

Value

hovplotBF returns a three-panel trellis object. hovBF returns an htest object.

References

Brown, M.~B. and Forsyth, A.~B. (1974). ``Robust tests for equality of variances.'' Journal of the American Statistical Association, 69:364--367.

Aliases
  • hovBF
  • hovplotBF
Examples
# NOT RUN {
data(batch)
batch1.aov <- aov(Calcium ~ Batch, data=batch)
anova(batch1.aov)
hovBF(Calcium ~ Batch, data=batch)
hovplotBF(Calcium ~ Batch, data=batch)
# }
Documentation reproduced from package HH, version 3.1-35, License: GPL (>= 2)

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