qualityTools (version 1.31.1)

effectPlot: Main Effect Plots

Description

A main effect plot is created for designs of type taguchiDesign and facDesign.

Usage

effectPlot(object, factors, fun = mean, single = FALSE, points = FALSE, classic = FALSE, axes = TRUE, lty, xlab, ylab, main, ylim, ...)

Arguments

object

a facDesign or taguchiDesign object

factors

for which factor is the effectPlot to be created

fun

a function for the construction of the effectPlot such as mean, link{median}

single

if TRUE device region can be set up using for instance par(mfrow = c(2,2))

points

if TRUE points are shown in addition to fun values

axes

TRUE by default

classic

TRUE by default to create an effectPlot as depicted in most textbooks

lty

line type used

xlab

label for x-axis

ylab

label for y-axis

main

title

ylim

limits for y-axis

...

further graphical parameters

Details

effectPlot uses an altered version of the base function interaction.plot to draw each effectPlot.

See Also

interactionPlot, paretoPlot,facDesign, response,normalPlot

Examples

#effectPlot for a 2^k factorial design
fdo = facDesign(k = 3)
response(fdo) = rnorm(8)  #set response with generic response function
effectPlot(fdo)

#effectPlot for a taguchiDesign
tdo = taguchiDesign("L9_3")
response(tdo) = rnorm(9)
effectPlot(tdo, points = TRUE, col = 2, pch = 16, lty = 3)