Investigating the `get_likelihood` method

[Felipe Alex Hofmann]

The get_likelihood method below may not work as expected:

Copulas/copulas/multivariate/vine.py

Lines 246 to 258 in dfe3bb9

 def get_likelihood(self, uni_matrix): 
     """Compute likelihood of the vine.""" 
     # TODO: explain what this is supposed to do and make it work 
     # TODO: Alternatively, remove it. 
     num_tree = len(self.trees) 
     values = np.empty([1, num_tree]) 
  
     for i in range(num_tree): 
         value, new_uni_matrix = self.trees[i].get_likelihood(uni_matrix) 
         uni_matrix = new_uni_matrix 
         values[0, i] = value 
  
     return np.sum(values) 

An explanation of what this method does should be added, and we should investigate whether it works as expected.