'ValueError: Metric 'cosine' not valid. Use sorted(sklearn.neighbors.VALID_METRICS['ball_tree'])
I'm trying to use cosine metric with Ball_tree algorithm since my data is of high dimensions. e.g.
nbrs = NearestNeighbors(n_neighbors=2,algorithm='ball_tree',metric='cosine').fit(data_seed)
However i get the following error:
ValueError: Metric 'cosine' not valid. Use sorted(sklearn.neighbors.VALID_METRICS['ball_tree']) to get valid options. Metric can also be a callable function.
I don't understand why i cannot use cosine similarity with ball tree?
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