a_to_alpha

<code>a_to_alpha</code> is a function for converting an a-parameter vector to an alpha angle vector.
The returned values are in the radian metric.

Uses the optimal test design approach by Birnbaum (1968, ISBN:9781593119348) and
van der Linden (2018) <doi:10.1201/9781315117430> to construct fixed, adaptive, and parallel tests.
Supports the following mixed-integer programming (MIP) solver packages: 'Rsymphony',
'highs', 'gurobi', 'lpSolve', and 'Rglpk'. The 'gurobi' package is not available from CRAN; see <https://www.gurobi.com/downloads/>.

Seung W. Choi

TestDesign

Optimal Test Design Approach to Fixed and Adaptive Test
Construction

Sangdon Lim

a_to_alpha function

<dl><dt>a</dt>
<dd>the a-parameter vector.</dd></dl>

Arguments

Calculate alpha angles from a-parameters — a_to_alpha

<dl>

<dt>a</dt>
<dd>the a-parameter vector.</dd>

</dl>

a_to_alpha: Calculate alpha angles from a-parameters

Description

Usage

Arguments

Examples