rBar: Mean Subgroup Range

Description Usage Arguments Value Examples

Description

Calculates the mean subgroup range used when constructing a XbarR chart.

Usage

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Arguments

data

data frame to be processed

value

numeric vector in a data frame with values of interest.

grouping

single factor/variable to split the data frame "values" by.

formula

a formula, such as y ~ x1 + x2, where the y variable is numeric data to be split into groups according to the grouping x factors/variables

...

further arguments passed to or from other methods.

Value

A number; mean subgroup range.

Examples

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set.seed(5555)
df <- data.frame(v=rnorm(60, 0, 1), g=rep(c("A","B","C","D","E"), each=12))
rBar(data = df, formula = v~g)

kenithgrey/rQC documentation built on May 20, 2019, 9:04 a.m.