Rexact {IQCC}R Documentation

Exact R control chart.

Description

This function builds a R control chart with exact (probability) limits.

Usage

Rexact(x, y, m)

Arguments

x The data to be plotted.
y The data used in phase I to estimate the standard deviation.
m The sample size.

Details

The exact limits are the alfa/2 and 1-alfa/2 quantiles of the R distribution that are calculated as estimated process sd times the quantiles of the relative range (W=R/sigma) distribution.

Value

Return a R control chart.

Author(s)

Daniela R. Recchia, Emanuel P. Barbosa

See Also

Raprox

Examples

data(pistonrings)
attach(pistonrings)
Rexact(pistonrings[26:40,],pistonrings[1:25,],5)

[Package IQCC version 1.0 Index]