plotMC {lordif} | R Documentation |
generate plots for Monte Carlo output
plotMC(obj, mfrow = c(3, 1), cexp = 1.0)
obj |
output object from lordif |
mfrow |
number of rows and columns per page for multi-fane plots |
cexp |
character expansion factor, e.g., cexp=2 for two times a normal size |
Generates the following graphs: 1. thresholds for Chi-square probability for Model 1 vs. 2 2. thresholds for Chi-square probability for Model 1 vs. 3 3. thresholds for Chi-square probability for Model 2 vs. 3 4. pseudo R-square change from Model 1 to 2 5. pseudo R-square change from Model 1 to 3 6. pseudo R-square change from Model 2 to 3 7. proportional beta change from Model 1 to 2
Returns no object.
obj is an object output from montecarlo
Seung W. Choi <s-choi@northwestern.edu>
Choi, S. W., Gibbons, L. E., & Crane, P. K. (under review). Development of an iterative hybrid ordinal logistic regression/IRT DIF: A Monte Carlo simulation approach for determining cutoff values. Behavior Research Methods.
##run lordif first ## Not run: age.dif <- lordif(Anxiety[paste("R",1:29,sep="")],Anxiety$age) ## Not run: plotDIF(age.dif,labels=c("Younger","Older")) ## Not run: age.dif.MC <- montecarlo(age.dif,alpha=.05,nr=500) ## Not run: plotMC(age.dif.MC,mfrow=c(1,1))