rpf (version 0.3)

rpf.dTheta: Item derivatives with respect to the location in the latent space

Description

Evaluate the partial derivatives of the response probability with respect to ability.

Usage

rpf.dTheta(m, param, where, dir)

Arguments

m

item model

param

item parameters

where

location in the latent distribution

dir

if more than 1 factor, a basis vector]