Combining Variable Columns with Same Values into a New Variable Using Vectors, Apply(), and Lapply in R

Merging Data Frames: A Comprehensive Guide to Combining Multiple Sources of Information

Merging Datasets with Similar Column Names Using Regular Expressions in R

Matching and Summing Data with Different Approaches in R: A Comprehensive Guide

Merging Data Frames with NA Values Replacement Strategies

Handling Missing Values in Data Analysis: A Three-Pronged Approach for Efficient Data Handling