| poly.mod-class {plink} | R Documentation |
The formal S4 class for poly.mod. This class characterizes the models and associated items for a set of item parameters.
The IRT models associted with the codes:
drm:gpcm:grm:mcm:nrm:
Objects can be created by calls of the form new("poly.mod", ...), but this is
not encouraged. Use the function link{as.poly.mod} instead.
model:drm, gpcm, grm, mcm, and nrm. See below for more details.items:model, where each element
identifies the items(rows) in the corresponding set of item parameters associated
with the model(s) identified in model.
The names of the list elements for items must correspond to the elements in model.
For example, if the poly.mod object is pm and the first element in pm@model is
drm,one should be able to reference the associated items by pm@items$drm. If
the list elements are unnamed, some functions may not work properly.
Jonathan P. Weeks weeksjp@gmail.com
as.poly.mod, irt.pars, sep.pars,
irt.prob