leacock_chodorow method
This method implements the leackock and chodorow relatedness measure. For the path distance and depth, node count is used.
Implementation
double leacock_chodorow(Synset synset1, Synset synset2, {bool normalize = false, double normalized_max = 1.0}){
assert(synset1.category == synset2.category);
int pathlen = synset1.shortest_path_distance(synset2) + 1;
double lch_sim = - (log(pathlen / (2 * (max_depth + 1)))) / log(10);
if(normalize){
lch_sim = this.normalize(lch_sim, normalized_max, SemRelMeasure.LeacockAndChodorow);
}
return dp(lch_sim, 5);
}