Utilities Class

The Utilities class is used for computing utilities in discrete choice modeling. In Opus opus_core there is one Utilities class implemented - linear_utilities - that computes linear utilities:

$$U_{ni} = \sum_{j=1}^J \beta_{ij}x_{nij}\,.$$

Here $i=1,\dots,I$ denotes the $I$ different alternatives, $n$ is an index for observations (agents), $x$ denotes values of $J$ variables (including constants) for each agent and alternative, and $\beta$ is a coefficient matrix of size $I\times J$. The run() method gets a 3-d array of data and a 2-d array of coefficients as arguments and returns a 2-d array of utilities.