How is Out-of-Bag Error Calculated in Random Forest?

http://stats.stackexchange.com/questions/70704/interpreting-out-of-bag-error-estimate-for-randomforestregressor

http://www.stat.berkeley.edu/~breiman/OOBestimation.pdf

http://scikit-learn.org/stable/auto_examples/ensemble/plot_gradient_boosting_oob.html

https://www.google.com/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=how+to+estimate+number+of+iterations+for+gradient+boosting



https://yanirseroussi.com/2014/12/29/stochastic-gradient-boosting-choosing-the-best-number-of-iterations/