http://stackoverflow.com/questions/13967063/remove-duplicate-rows-in-r
http://www.statmethods.net/input/missingdata.html
http://www.statmethods.net/stats/correlations.html
https://cran.r-project.org/web/packages/corrplot/vignettes/corrplot-intro.html
http://seaborn.pydata.org/generated/seaborn.boxplot.html
https://www.kaggle.com/ndrewgele/d/abcsds/pokemon/visualizing-pok-mon-stats-with-seaborn/notebook
https://www.gnu.org/software/octave/
https://github.com/rasmusbergpalm/DeepLearnToolbox
http://datascienceplus.com/building-wordclouds-in-r/
https://www.analyticsvidhya.com/blog/2015/08/learning-concept-knn-algorithms-programming/
https://www.analyticsvidhya.com/blog/2015/09/complete-guide-boosting-methods/
https://www.rankranger.com/blog/interactive-google-algorithm-timeline
https://www.analyticsvidhya.com/blog/2015/09/complete-guide-boosting-methods/
https://www.analyticsvidhya.com/blog/2016/01/guide-data-exploration/#one
https://research.google.com/bigpicture/attacking-discrimination-in-ml/
http://datascience.stackexchange.com/questions/6084/how-do-i-create-a-complex-radar-chart