// In this method, each tag that is incompatible with the current word
// (e.g., apple_CC) gets a default (constant) score instead of its exact score.
// The scores of all other tags are computed exactly.
private double[] GetApproximateScores(History h)
{
string[] tags = StringTagsAt(h.current - h.start + LeftWindow());
double[] scores = GetHistories(tags, h);
// log score for each active tag, unnormalized
// Number of tags that get assigned a default score:
int nDefault = maxentTagger.ySize - tags.Length;
double logScore = ArrayMath.LogSum(scores);
double logScoreInactiveTags = maxentTagger.GetInactiveTagDefaultScore(nDefault);
double logTotal = SloppyMath.LogAdd(logScore, logScoreInactiveTags);
ArrayMath.AddInPlace(scores, -logTotal);
return(scores);
}
