Displaying 3 results from an estimated 3 matches for "plotpimap".
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2008 Jan 28
0
eRm: new version 0.9-6
Dear useRs,
new and updated features in eRm 0.9-6 for extended Rasch modeling:
- infit and outfit mean-square statistics added to functions personfit()
and itemfit().
- new method: plotPImap() plots a person-item map (cf. Bond & Fox,
2007), i.e., a map
of locations of item (and threshold) parameters, and the distribution of
person parameters.
- new options in plotGOF():
'conf': draws confidence ellipses for item parameters, optionally single
items can be chosen interact...
2008 Jan 28
0
eRm: new version 0.9-6
Dear useRs,
new and updated features in eRm 0.9-6 for extended Rasch modeling:
- infit and outfit mean-square statistics added to functions personfit()
and itemfit().
- new method: plotPImap() plots a person-item map (cf. Bond & Fox,
2007), i.e., a map
of locations of item (and threshold) parameters, and the distribution of
person parameters.
- new options in plotGOF():
'conf': draws confidence ellipses for item parameters, optionally single
items can be chosen interact...
2010 Mar 15
0
Partial Credit Models using eRm
...t_bowel, rasch_bart$bart_blad, rasch_bart$bart_toil, rasch_bart$bart_feed, rasch_bart$bart_dress, rasch_bart$bart_stairs, rasch_bart$bart_trans, rasch_bart$bart_mob, rasch_bart$bart_groom, rasch_bart$bart_bath), nrow=100, ncol=10)
bart_pcm <- PCM(mat1)
summary(bart_pcm)
# Item location map
plotPImap(bart_pcm, item.subset=c(1,2))
but I can't get the person-item plot to work. I receive an error from R saying:
Error in xb[, dim(xb)[2]] : incorrect number of dimensions.
Secondly,
How would you interpret the following parameter estimates i.e. the eta and beta estimates?:
> summ...