plot.monotonicity.class {mokken} | R Documentation |
S3 Method to plot
objects of class monotonicity.class.
Graphic display of the checks of monotonicity.
One graph for each item plotting the estimated item step response functions.
## S3 method for class 'monotonicity.class': plot(x, items = all, ...)
x |
Object of class monotonicity.class produced by check.monotonicity . |
items |
vector containing the numbers of the items for which the results are depicted graphically. Default the results for all items are depicted. |
... |
Optional graphical parameters will be ignored |
The default graphic device in R may only display the last graph.
Returns a graph.
L. A. van der Ark a.vdark@uvt.nl
Molenaar, I.W. and Sijtsma, K. (2000) User's Manual MSP5 for Windows [Software manual]. Groningen, The Netherlands: IEC ProGAMMA.
Sijtsma, K, and Molenaar, I. W. (2002) Introduction to nonparametric item response theory. Thousand Oaks, CA: Sage.
Van der Ark, L. A. (2007). Mokken scale analysis in R. Journal of Statistical Software. http://www.jstatsoft.org
check.monotonicity
, summary.monotonicity.class
data(acl) Communality <- acl[,1:10] monotonicity.list <- check.monotonicity(Communality) plot(monotonicity.list) summary(monotonicity.list)