## S3 method for class 'lordif.MC'
plot(x, mfrow = c(3, 1), width = 7, height = 7, ...)
Arguments
x
an object of class lordif.MC returned from montecarlo
mfrow
number of rows and columns per page for multi-fane plots
width
width of the canvas of the plotting device in inches
height
height of the canvas of the plotting device in inches
...
extra graphical parameters
Details
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
Value
Returns no object.
Note
x is an object of class lordif.MC returned from montecarlo
Author(s)
Seung W. Choi <choi.phd@gmail.com>
References
Choi, S. W., Gibbons, L. E., Crane, P. K. (2011). lordif: An R Package for Detecting Differential Item Functioning Using Iterative Hybrid Ordinal Logistic Regression/Item Response Theory and Monte Carlo Simulations. Journal of Statistical Software, 39(8), 1-30. URL http://www.jstatsoft.org/v39/i08/.
See Also
lordif, montecarlo, permute
Examples
## s3 plot method for class 'lordif.MC':
## Not run: age.dif <- lordif(Anxiety[paste("R",1:29,sep="")],Anxiety$age)
## Not run: age.dif.MC <- montecarlo(age.dif,alpha=.05,nr=500)
## Not run: plot(age.dif.MC,mfrow=c(1,1),width=8,height=7)