Extract an item object from mirt objects
Extract the internal mirt objects from any estimated model.
extract.item(x, item, group = NULL, drop.zeros = FALSE)
x |
mirt model of class 'SingleGroupClass' or 'MultipleGroupClass' |
item |
a number or character signifying which item to extract |
group |
a number signifying which group the item should be extracted from (applies to 'MultipleGroupClass' only) |
drop.zeros |
logical; drop slope values that are numerically close to zero to reduce
dimensionality? Useful in objects returned from |
Chalmers, R., P. (2012). mirt: A Multidimensional Item Response Theory Package for the R Environment. Journal of Statistical Software, 48(6), 1-29. doi: 10.18637/jss.v048.i06
## Not run: mod <- mirt(Science, 1) extr.1 <- extract.item(mod, 1) ## End(Not run)
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