wrote (tuned) random forest estimator for 1k sample training/testing sets.
wrote new script based on subset_rf.R to investigate rf accuracy as a function of training.set size.
caught typo with parentheses.
added OOB analysis and a vote proportion plot.
fixed a typo in the end, for saving the workspace, and expanded hyper-parmater grid to 3D.
fixed up rf_investigation to handle grizzlybear output and 3D hyper-parameter grid.
wrote cv suite with caret to investiate best mtry for rf.
updated .gitignore.