/// <summary>
/// Question part of the model
/// </summary>
/// <param name="person">The person.</param>
/// <param name="suffix">The suffix.</param>
/// <exception cref="System.Exception">Unrolling not implemented if more than two skills needed for a question</exception>
private void QuestionModelPart(int person, string suffix = "")
{
for (int question = 0; question < this.NumberOfQuestions; question++)
{
int[] skillsNeeded = this.SkillsNeeded[question];
switch (skillsNeeded.Length)
{
case 1:
this.isCorrect[person][question].SetTo(
Factors.AddNoise(
this.unrolledSkills[person][skillsNeeded[0]],
this.ProbabilityOfNotMistake,
this.ProbabilityOfGuess));
break;
case 2:
var hasSkills =
(this.unrolledSkills[person][skillsNeeded[0]] & this.unrolledSkills[person][skillsNeeded[1]])
.Named("hasSkills" + (question + 1) + suffix);
this.isCorrect[person][question].SetTo(
Factors.AddNoise(hasSkills, this.ProbabilityOfNotMistake, this.ProbabilityOfGuess));
break;
default:
throw new Exception("Unrolling not implemented if more than two skills needed for a question");
}
}
}
