plotParallel {nFactors}

Plot a Parallel Analysis Class Object

Description

Plot a scree plot adding information about a parallel analysis.

Usage

plotParallel(parallel, eig = NA, x = eig, model = "components",
  legend = TRUE, ylab = "Eigenvalues", xlab = "Components",
  main = "Parallel Analysis", ...)

Arguments

parallel

numeric: vector of the results of a previous parallel analysis

eig

depreciated parameter: eigenvalues to analyse (not used if x is used, recommended)

x

numeric: a vector of eigenvalues, a matrix of correlations or of covariances or a data.frame of data

model

character: "components" or "factors"

legend

logical: indicator of the presence or not of a legend

ylab

character: label of the y axis

xlab

character: label of the x axis

main

character: title of the plot

...

variable: additionnal parameters to give to the cor or cov functions

Details

If eig is FALSE the plot shows only the parallel analysis without eigenvalues.

Value

Nothing returned.

Author(s)

Gilles Raiche
Centre sur les Applications des Modeles de Reponses aux Items (CAMRI)
Universite du Quebec a Montreal
[e-mail]

References

Raiche, G., Walls, T. A., Magis, D., Riopel, M. and Blais, J.-G. (2013). Non-graphical solutions for Cattell's scree test. Methodology, 9(1), 23-29.

See Also

plotuScree, nScree, plotnScree, parallel

Examples

## SIMPLE EXAMPLE OF A PARALLEL ANALYSIS
## OF A CORRELATION MATRIX WITH ITS PLOT
 data(dFactors)
 eig      <- dFactors$Raiche$eigenvalues
 subject  <- dFactors$Raiche$nsubjects
 var      <- length(eig)
 rep      <- 100
 cent     <- 0.95
 results  <- parallel(subject,var,rep,cent)

 results


## PARALLEL ANALYSIS SCREE PLOT
 plotParallel(results, x=eig)
 plotParallel(results)