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scikit-learnでkmeans++

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動機

自前のクラスタリング手法においてkmeans++を使いたい.
sklearn.cluster.KMeansの初期化方法にkmeans++があるので,これをなんとか呼び出したい.

できる

from sklearn.cluster.k_means_ import _k_init
from sklearn.utils.extmath import row_norms
import numpy as np

# x: データ, k: クラスタ数
c = _k_init(x, k, row_norms(x, squared=True), np.random.RandomState())
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