test_hierarchical.py 文件源码

def test_connectivity_propagation():
    # Check that connectivity in the ward tree is propagated correctly during
    # merging.
    X = np.array([(.014, .120), (.014, .099), (.014, .097),
                  (.017, .153), (.017, .153), (.018, .153),
                  (.018, .153), (.018, .153), (.018, .153),
                  (.018, .153), (.018, .153), (.018, .153),
                  (.018, .152), (.018, .149), (.018, .144)])
    connectivity = kneighbors_graph(X, 10, include_self=False)
    ward = AgglomerativeClustering(
        n_clusters=4, connectivity=connectivity, linkage='ward')
    # If changes are not propagated correctly, fit crashes with an
    # IndexError
    ward.fit(X)