- Udacity Dicussion Forum
- https://en.wikipedia.org/wiki/Precision_and_recall
- http://scikit-learn.org/0.17/modules/generated/sklearn.cross_validation.StratifiedShuffleSplit.html
- http://scikit-learn.org/0.17/auto_examples/svm/plot_rbf_parameters.html
- https://medium.com/@aneesha/svm-parameter-tuning-in-scikit-learn-using-gridsearchcv-2413c02125a0#.rttqyetap
- http://scikit-learn.org/stable/modules/generated/sklearn.ensemble.AdaBoostClassifier.html
- https://github.com/seifip/udacity-data-analyst-nanodegree/blob/master/P5%20-%20Identifying%20Fraud%20from%20Enron%20Emails%20and%20Financial%20Data/project/poi_id.py
- http://scikit-learn.org/stable/modules/generated/sklearn.ensemble.RandomForestClassifier.html
- http://scikit-learn.org/stable/modules/generated/sklearn.svm.SVC.html
- http://scikit-learn.org/stable/modules/generated/sklearn.tree.DecisionTreeClassifier.html
- https://randomforests.wordpress.com/2014/02/02/basics-of-k-fold-cross-validation-and-gridsearchcv-in-scikit-learn/
- http://scikit-learn.org/stable/modules/generated/sklearn.model_selection.GridSearchCV.html
- https://www.quora.com/Why-is-principal-component-analysis-used
- https://www.quora.com/What-is-the-difference-between-principal-component-analysis-PCA-and-feature-selection-in-machine-learning-Is-PCA-a-means-of-feature-selection