Creating a Single DataFrame by Aggregating Multiple DataFrames in R Using Nested sapply Functions

Using the `ddply` Function in R: A Comprehensive Guide to Date Manipulation and Aggregation

Writing Per-Variable Counts with Data.tables in R: Efficient CSV File Output Using l_ply Function

The Great R Package Confusion: Why summarize Doesn't Work with Group By in dplyr

Calculating Standardized Distance Measures on Subset of Data Without First Saving Subset as New DataFrame

Creating a Function Out of a Dataframe with a Formula for Efficient Linear Regression Coefficients Calculation

Using do.call to Build and Execute Data.table Commands: A Comprehensive Guide