.. note:: :class: sphx-glr-download-link-note Click :ref:`here ` to download the full example code .. rst-class:: sphx-glr-example-title .. _sphx_glr_auto_examples_decomposition_plot_pca_iris.py: ========================================================= PCA example with Iris Data-set ========================================================= Principal Component Analysis applied to the Iris dataset. See `here `_ for more information on this dataset. .. image:: /auto_examples/decomposition/images/sphx_glr_plot_pca_iris_001.png :class: sphx-glr-single-img .. code-block:: python print(__doc__) # Code source: Gaƫl Varoquaux # License: BSD 3 clause import numpy as np import matplotlib.pyplot as plt from mpl_toolkits.mplot3d import Axes3D from sklearn import decomposition from sklearn import datasets np.random.seed(5) centers = [[1, 1], [-1, -1], [1, -1]] iris = datasets.load_iris() X = iris.data y = iris.target fig = plt.figure(1, figsize=(4, 3)) plt.clf() ax = Axes3D(fig, rect=[0, 0, .95, 1], elev=48, azim=134) plt.cla() pca = decomposition.PCA(n_components=3) pca.fit(X) X = pca.transform(X) for name, label in [('Setosa', 0), ('Versicolour', 1), ('Virginica', 2)]: ax.text3D(X[y == label, 0].mean(), X[y == label, 1].mean() + 1.5, X[y == label, 2].mean(), name, horizontalalignment='center', bbox=dict(alpha=.5, edgecolor='w', facecolor='w')) # Reorder the labels to have colors matching the cluster results y = np.choose(y, [1, 2, 0]).astype(np.float) ax.scatter(X[:, 0], X[:, 1], X[:, 2], c=y, cmap=plt.cm.nipy_spectral, edgecolor='k') ax.w_xaxis.set_ticklabels([]) ax.w_yaxis.set_ticklabels([]) ax.w_zaxis.set_ticklabels([]) plt.show() **Total running time of the script:** ( 0 minutes 0.186 seconds) .. _sphx_glr_download_auto_examples_decomposition_plot_pca_iris.py: .. only :: html .. container:: sphx-glr-footer :class: sphx-glr-footer-example .. container:: sphx-glr-download :download:`Download Python source code: plot_pca_iris.py ` .. container:: sphx-glr-download :download:`Download Jupyter notebook: plot_pca_iris.ipynb ` .. only:: html .. rst-class:: sphx-glr-signature `Gallery generated by Sphinx-Gallery `_