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working around issue in kmc2 #38

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working around issue in kmc2 #38

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3 changes: 3 additions & 0 deletions python/bolt/bolt_api.py
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Original file line number Diff line number Diff line change
Expand Up @@ -137,6 +137,9 @@ def _learn_centroids(X, ncentroids, ncodebooks):
start_col = i * subvect_len
end_col = start_col + subvect_len
X_in = X[:, start_col:end_col]
if np.unique(X_in).size == 1 and X_in.size > 1:
#kmc2 has a bug if all rows of matrix are duplicates
X_in[0,0] += 0.001
centroids, labels = kmeans(X_in, ncentroids)
ret[:, i, :] = centroids

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