qualityTools (version 1.49)

interactionPlot: interactionPlot

Description

Display effects of an object of class facDesign in a line plot.

Usage

interactionPlot(fdo = NULL, y = NULL, response = NULL, fun = mean, main, col = 1:2, ...)

Arguments

fdo

needs to be an object of class facDesign or a vector x.

fun

function to use for the calculation of the interactions, as mean,median,etc.

col

vector of colors for the plot. Single colors can be given as character strings or numeric values.

y

if fdo is a vector, interactionPlot() defaults to interaction.plot from package stats if y is a vector too.

response

response variable.

main

an overall title for the plot: see title.

...

further graphical parameters: see par.

Value

• none

Details

interactionPlot() displays interactions for an object of class facDesign (i.e. 2^k full or 2^k-p fractional factorial design). Parts of the original interactionPlot were integrated.

See Also

factors fracDesign http://www.user.tu-berlin.de/kalicete/qualityTools/S5.html#SS1

Examples

vp = fracDesign(k = 3, replicates = 2)                             #NA in response column and 2 replicates per factor combination
y = 4*vp[,1] -7*vp[,2] + 2*vp[,2]*vp[,1] + 0.2*vp[,3] + rnorm(16)  #generate some data
response(vp) = y
interactionPlot(vp)                                                #show effects and interactions (nothing significant expected)