psych (version 1.0-77)

sim.VSS: create VSS like data

Description

Simulation is one of most useful techniques in statistics and psychometrics. Here we simulate a correlation matrix with a simple structure composed of a specified number of factors. Each item is assumed to have complexity one. See circ.sim and item.sim for alternative simulations.

Usage

sim.VSS(ncases=1000, nvariables=16, nfactors=4, meanloading=.5,dichot=FALSE,cut=0)

Arguments

ncases

number of simulated subjects

nvariables

Number of variables

nfactors

Number of factors to generate

meanloading

with a mean loading

dichot

dichot=FALSE give continuous variables, dichot=TRUE gives dichotomous variables

cut

if dichotomous = TRUE, then items with values > cut are assigned 1, otherwise 0.

Value

• a ncases x nvariables matrix

See Also

VSS, ICLUST

Examples

simulated <- sim.VSS(1000,20,4,.6)
vss <- VSS(simulated,rotate="varimax")
VSS.plot(vss)