effectPlot: Main Effect Plots
In qualityTools: Statistical Methods for Quality Science

Description Usage Arguments Details Note Author(s) See Also Examples

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

1
2
3

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

`object`	needs to be an object of class `facDesign` or `taguchiDesign`.
`factors`	for which factor is the effectPlot to be created.
`fun`	a function for the construction of the effectPlot such as `mean`, `median`,etc. By default `fun` is set to `mean`.
`response`	response variable. If the response data frame of fdo consists of more then one responses, this variable can be used to choose just one column of the response data frame. `response` needs to be an object of class character with length of ‘1’. It needs to be the same character as the name of the response in the response data frame that should be plotted. By default `response` is set to ‘NULL’.
`single`	logical value. If ‘TRUE’ device region can be set up using for instance `par(mfrow = c(2,2))`. By default `single` is set to ‘FALSE’.
`points`	logical value. If ‘TRUE’ points are shown in addition to values out of `fun`. By default `points` is set to ‘FALSE’.
`axes`	logical value indicating wheter the axes should be drawn or not. ‘TRUE’ by default.
`classic`	logical value. ‘TRUE’ creates an effectPlot as depicted in most textbooks. By default `classic` is set to ‘FALSE’.
`lty`	numerical value which specifies the line type used.
`xlab`	a title for the x axis: `title`.
`ylab`	a title for the y axis: `title`.
`main`	an overall title for the plot: see `title`.
`ylim`	vector giving the range of the y-axis.
`...`	Arguments to be passed to methods, such as graphical parameters (see `par`).

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

For an example in context which shows the usage of the function effectPlot() to an object of class facDesign or an object of class taguchiDesign, please read the vignette for the package qualityTools at http://www.r-qualitytools.org/html/Improve.html.

Thomas Roth thomas.roth@tu-berlin.de

interactionPlot
paretoPlot
snPlot
facDesign
response
normalPlot
http://www.r-qualitytools.org/html/Improve.html

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

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