dev/notebooks/auto_examples/cluster/plot_kmeans_plusplus.ipynb

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        "%matplotlib inline"
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        "\n# An example of K-Means++ initialization\n\nAn example to show the output of the :func:`sklearn.cluster.kmeans_plusplus`\nfunction for generating initial seeds for clustering.\n\nK-Means++ is used as the default initialization for `k_means`.\n"
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      "source": [
        "from sklearn.cluster import kmeans_plusplus\nfrom sklearn.datasets import make_blobs\nimport matplotlib.pyplot as plt\n\n# Generate sample data\nn_samples = 4000\nn_components = 4\n\nX, y_true = make_blobs(\n    n_samples=n_samples, centers=n_components, cluster_std=0.60, random_state=0\n)\nX = X[:, ::-1]\n\n# Calculate seeds from kmeans++\ncenters_init, indices = kmeans_plusplus(X, n_clusters=4, random_state=0)\n\n# Plot init seeds along side sample data\nplt.figure(1)\ncolors = [\"#4EACC5\", \"#FF9C34\", \"#4E9A06\", \"m\"]\n\nfor k, col in enumerate(colors):\n    cluster_data = y_true == k\n    plt.scatter(X[cluster_data, 0], X[cluster_data, 1], c=col, marker=\".\", s=10)\n\nplt.scatter(centers_init[:, 0], centers_init[:, 1], c=\"b\", s=50)\nplt.title(\"K-Means++ Initialization\")\nplt.xticks([])\nplt.yticks([])\nplt.show()"
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