effectstars.DIFlasso {EffectStars2}

Plot effect stars for DIFlasso objects.

Description

Plots effect stars for DIFlasso-objects. The parameter estimates for DIF-items are plotted, grouped by items.

For more details on plotting effect stars see effectstars.

Usage

## S3 method for class 'DIFlasso'
effectstars(x, only.DIFitems = TRUE, ...)

Arguments

x

A DIFlasso-object.

only.DIFitems

If TRUE, only the estimates unequal to zero (estimates from the DIF-items) are visualized with EffectStars.

...

further arguments for generic function effectstars.

Author(s)

Gunther Schauberger
[e-mail]

https://www.sg.tum.de/epidemiologie/team/schauberger/

References

Tutz, G. and Schauberger, G. (2015): A Penalty Approach to Differential Item Functioning in Rasch Models, , Psychometrika, 80(1), 21 – 43

Tutz, G. and Schauberger, G. (2013): Visualization of Categorical Response Models - from Data Glyphs to Parameter Glyphs, Journal of Computational and Graphical Statistics 22(1), 156–177.

Gerhard Tutz (2012): Regression for Categorical Data, Cambridge University Press

See Also

star.ctrl, effectstars

Examples

## Not run: 
### example for DIFlasso

library(DIFlasso)
data(simul.data)

Y <- simul.data[,1:10]
X <- simul.data[,11:13]

m1 <- DIFlasso(Y = Y, X = X, trace = TRUE) 

effectstars(m1)


## End(Not run)