[python] PCA and figure

https://towardsdatascience.com/dive-into-pca-principal-component-analysis-with-python-43ded13ead21

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https://towardsdatascience.com/pca-using-python-scikit-learn-e653f8989e60

https://machinelearningmastery.com/feature-selection-machine-learning-python/

 

https://sebastianraschka.com/faq/docs/feature_sele_categories.html

https://www.datacamp.com/community/tutorials/feature-selection-python