Expanding Rows in a Data.Frame Based on Column Values in R

Optimizing Similarity Matching: A Step-by-Step Guide to Grouping Observations

Modify Variable in Data Frame for Specific Factor Levels Using Base R, dplyr, and data.table

Finding Rows of a Data Frame Where Certain Columns Match Those of Another Using R's Merge Function

Using data.table and dplyr for efficient R Data Frame Matching

Replicating Rows in R Data Frames and Indexing New Duplicates

Handling Missing Data in R: A Conditional Approach Using Consecutive NA Values

Reshaping DataFrames from Wide to Long Format in R using tidyr and dplyr Packages

Effective Date Range Queries with Fuzzy Joining in R

Understanding the Problem and Dataframe Operations: A Conditional Replacement Solution Using R