xgBoost :: classification example
https://deepsense.ai/wp-content/uploads/2015/11/xgboost.pdf
https://rstudio-pubs-static.s3.amazonaws.com/229885_4947089f114448e7836e25112bb05544.html#
input data는 (data.frame이 아니라) matrix를 사용한 예.
Agaricus (아가리쿠스버섯)
Outbreaks of animal diseases
https://www.kaggle.com/rtatman/machine-learning-with-xgboost-in-r
https://www.kaggle.com/rtatman/machine-learning-with-xgboost-in-r-workbook
Machine Learning with XGBoost (in R) Workbook
predict which outbreaks of animal diseases will lead to humans getting sick.