python 篇：
http://machinelearningmastery.com/ensemble-machine-learning-algorithms-python-scikit-learn/
http://machinelearningmastery.com/compare-machine-learning-algorithms-python-scikit-learn/
R 篇：
http://machinelearningmastery.com/machine-learning-ensembles-with-r/
http://machinelearningmastery.com/how-to-get-started-with-machine-learning-algorithms-in-r/