Fixes the performance on cosine metric

Bruno Alano · Bruno Alano · commit 1e65bda48d48 · 2016-08-30T16:15:45.000-03:00
diff --git a/hdbscan/hdbscan_.py b/hdbscan/hdbscan_.py
@@ -37,7 +37,7 @@
 
 from .plots import CondensedTree, SingleLinkageTree, MinimumSpanningTree
 
-FAST_METRICS = KDTree.valid_metrics + BallTree.valid_metrics
+FAST_METRICS = KDTree.valid_metrics + BallTree.valid_metrics + ['cosine', 'arccos']
 
 # Supporting numpy prior to version 1.7 is a little painful ...
 if hasattr(np, 'isclose'):
