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:ref:`Classification <supervised-learning>`
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<p>Identifying to which category an object belongs to.</p>
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<strong>Applications</strong>: Spam detection, Image recognition.</br>
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:ref:`Regression <supervised-learning>`
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<p>Predicting a continuous-valued attribute associated with an object.</p>
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<strong>Applications</strong>: Drug response, Stock prices.</br>
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:ref:`SVR<svm>`, :ref:`ridge regression<ridge_regression>`, :ref:`Lasso<lasso>`, ...
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:ref:`Clustering<clustering>`
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<p>Automatic grouping of similar objects into sets.</p>
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<strong>Applications</strong>: Customer segmentation, Grouping experiment outcomes</br>
<strong>Algorithms</strong>:
:ref:`k-Means<k_means>`, :ref:`spectral clustering<spectral_clustering>`, :ref:`mean-shift<mean_shift>`, ...
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:ref:`Dimensionality reduction<decompositions>`
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<strong>Applications</strong>: Visualization, Increased efficiency</br>
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:ref:`Preprocessing<preprocessing>`
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<strong>Application</strong>: Transforming input data such as text for use with machine learning algorithms.</br>
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.. toctree::
:maxdepth: 2
:hidden:
preface
tutorial/index
user_guide
auto_examples/index
modules/classes
developers/index