cubePlot: Cube plot for three-factor-effects

In FrF2: Fractional Factorial Designs with 2-Level Factors

Cube plot for three-factor-effects

Description

A cube plot for the combined effect of three factors is produced (function cubePlot). Functions cubedraw, cubecorners, cubelabel and myscatterplot3d are not intended for users.

Usage

cubePlot(obj, eff1, eff2, eff3, main=paste("Cube plot for",respnam),
    cex.title=1.5,cex.lab=par("cex.lab"), cex.ax=par("cex.axis"),  
    cex.clab=1.2, size=0.3, round=NULL,
    abbrev=4,y.margin.add=-0.2, modeled=TRUE)

Arguments

obj	a vector of response values to be analyzed OR a linear model object with 2-level factors or numerical 2-level variables (CAUTION: numerical x-variable have to be coded as -1 and +1 only!); the structure must be such that effects are either fully aliased or orthogonal, like in a fractional factorial 2-level design
eff1	cf. eff3
eff2	cf. eff3
eff3	effects to be included in the cube plot (x-, y-, z-direction), EITHER vectors of equal length (two-level factors or numerical with the two values -1 and 1) OR variable names of main effects within the obj linear model object (character strings)
main	title for the plot, respnam is the name of the response variable as determined from the call
cex.title	multiplier for size of overall title (cex.main is multiplied with this factor)
cex.ax	size of axis tick marks, defaults to cex.axis-parameter
cex.lab	size of axis labels
cex.clab	size of corner labels
size	size of cube corners
round	optional rounding of corner labels (digits argument for function round, e.g. round=0 for integers, round=-1 for multiples of 10, round=1 for 1 decimal place
abbrev	number of characters shown for factor levels
y.margin.add	adjustment parameter for placement of y-axis labeling
modeled	TRUE (default: show modeled means; FALSE: show averages NOTE: Even when showing modeled means, there also appears to be a three-factor-interaction, if the model contains an effect that is aliased with this interaction!

Details

cubePlot produces a cube plot of the modeled means or averages of all combinations for three factors. The other functions are internal and are called by cubePlot. myscatterplot3d is a modified version of scatterplot3d, made more suitable for this situation.

Value

cubePlot is used for its side effects only.

Author(s)

Ulrike Groemping

References

Box G. E. P, Hunter, W. C. and Hunter, J. S. (2005) Statistics for Experimenters, 2nd edition. New York: Wiley.

See Also

FrF2-package for examples

FrF2 documentation built on Sept. 20, 2023, 9:08 a.m.