validateExpression: (Internal) Validate constraint condition expression

In TestDesign: Optimal Test Design Approach to Fixed and Adaptive Test Construction

(Internal) Validate constraint condition expression

Description

validateExpression is an internal function for validating a constraint's condition expression.

Usage

validateExpression(x, attrib, unit_name, use_lt)

Arguments

x	a data.frame row containing a single constraint data.
attrib	an item_attrib object or a st_attrib object.
unit_name	items or stimuli.
use_lt	if TRUE, will raise an error when number of matching items/stimuli is less than 2. if FALSE, will raise an error when number of matching items/stimuli is 0.

Value

validateExpression does not return any values; it stops if the input constraint is not valid.

TestDesign documentation built on Sept. 11, 2024, 7:12 p.m.