r_subheading-Course Description-r_end We are now ready to build our first model in RStudio. r_break r_break r_subheading-What You'll Learn-r_end • Correcting column names derived from tokenization to ensure smooth model training. r_break • Using caret to set up stratified cross validation. r_break • Using the doSNOW package to accelerate caret machine learning training by using multiple CPUs in parallel. r_break • Using caret to train single decision trees on text features and tune the trained model for optimal accuracy. r_break • Evaluating the results of the cross validation process.