Adding Dummy Variables for XGBoost Model Predictions with Sparse Feature Sets

Based on the provided specification, I'll write a complete R function that transforms a tdm matrix into a new matrix with an additional column representing the class of each term.

Understanding the Error 'input data must have the same two levels' in F_meas: A Guide to Resolving Data Categorization Issues

Understanding Resampling-Based Performance Measures in caret: A Comprehensive Guide to Machine Learning with R

Fixed: Train Function Hangs Indefinitely Using R Caret Package

Machine Learning using R Linear Regression: A Step-by-Step Guide to Predicting Future CPU Usage Based on Memory Levels