nFactors (version 2.4.1.1)

summary.structureSim: Utility Functions for nScree Class Objects

Description

Utility functions for structureSim class objects. Note that with the plot.structureSim a dotted black vertical line shows the median number of factors retained by all the different indices.

Usage

# S3 method for structureSim
summary(object, index = c(1:15),
  eigenSelect = NULL, ...)
# S3 method for structureSim
print(x, index = NULL, ...)
# S3 method for structureSim
boxplot(x, nFactors = NULL, eigenSelect = NULL,
  vLine = "green", xlab = "Factors", ylab = "Eigenvalues",
  main = "Eigen Box Plot", ...)
# S3 method for structureSim
plot(x, nFactors = NULL, index = NULL,
  main = "Index Acuracy Plot", ...)
is.structureSim(object)

Value

Generic functions for the structureSim class:

boxplot.structureSim

graphic: plots an eigen boxplot

is.structureSim

logical: is the object of the class structureSim?

plot.structureSim

graphic: plots an index acuracy plot

print.structureSim

numeric: data.frame of statistics about the number of components/factors to retain according to different indices following a structureSim simulation

summary.structureSim

list: two data.frame, the first with the details of the simulated eigenvalues, the second with the details of the simulated indices

Arguments

object

structureSim: an object of the class structureSim

index

numeric: vector of the index of the selected indices

eigenSelect

numeric: vector of the index of the selected eigenvalues

...

variable: additionnal parameters to give to the boxplot, plot, print and summary functions.

x

structureSim: an object of the class structureSim

nFactors

numeric: if known, number of factors

vLine

character: color of the vertical indicator line of the initial number of factors in the eigen boxplot

xlab

character: x axis label

ylab

character: y axis label

main

character: main title

Author

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

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

nFactors-package

Examples

if (FALSE) {
## INITIALISATION
 library(xtable)
 library(nFactors)
 nFactors  <- 3
 unique    <- 0.2
 loadings  <- 0.5
 nsubjects <- 180
 repsim    <- 10
 var       <- 36
 pmjc      <- 12
 reppar    <- 10
 zwick     <- generateStructure(var=var, mjc=nFactors, pmjc=pmjc,
                                loadings=loadings,
                                unique=unique)

## SIMULATIONS
mzwick    <-  structureSim(fload=as.matrix(zwick), reppar=reppar,
                           repsim=repsim, details=TRUE,
                           N=nsubjects, quantile=0.5)

## TEST OF structureSim METHODS
 is(mzwick)
 summary(mzwick, index=1:5, eigenSelect=1:10, digits=3)
 print(mzwick, index=1:10)
 plot(x=mzwick, index=c(1:10), cex.axis=0.7, col="red")
 boxplot(x=mzwick, nFactors=3, vLine="blue", col="red")
 }