code: def _cossim(cv1, cv2):
      return cv1.T.dot(cv2)[0, 0] / (_magnitude(cv1) * _magnitude(cv2))
  
file_path: gensim/gensim/topic_coherence/indirect_confirmation_measure.py
imports: import itertools
  import logging
  import numpy
  import scipy.sparse
  from gensim.topic_coherence.direct_confirmation_measure import aggregate_segment_sims, log_ratio_measure
label_desc: Use image node_id 4 for calling a global function with example usage: _cossim(cv1, cv2) and returns: unknown