item_selector: Linear programming solver

In cat.dt: Computerized Adaptive Testing and Decision Trees

Description

Computes the exposure rate of every item allocated to every level node. If more than one item is allocated to the same level node, the node splits.

Usage

item_selector(E_mat, D, C, minmax)

Arguments

E_mat	matrix of the associated value of every item allocated to every level node. Rows represent items and columns represent level nodes. The "associated value" can be the MSE if the selection criterium is "MEPV", the FI if the selection criterium is "MFI" and ****
D	vector of confluencies of every level node
C	vector of item capacities
minmax	optimisation direction. Options: TRUE to maximise and FALSE to minimise

Value

A matrix of exposure rates. Rows represent items and columns represent level nodes. Every item with a positive exposure rate for a level node is allocated to that node

Author(s)

Javier Rodríguez-Cuadrado

cat.dt documentation built on March 31, 2021, 5:07 p.m.