trueability/rstudio repository overview

This image is based off of rocker/rstudio with additional plugins.

Included Plugins: * XML * bst * car * cem * docopt * edarf * gam * gbm * gbts * ggplot2 * glm.predict * glm2 * glmbb * glmmLasso * glmmsr * glmnet * glmnet * littler * lme4 * logistf * magrittr * mlogit * neuralnet * randomForest * randomForestSRC * stringi * stringr * tree * varSelRF * xgboost