Grouping Data by Multiple Factors with Different Group Sizes in R Using Dplyr

How to Expand a DataFrame Within a Function Using a Date Sequence in R.

Using ddply and dplyr for Data Summarization in R: A Comprehensive Guide to Grouping and Aggregation

Creating Wide-to-Long DataFrames in R Using Vectorized Operations

Understanding the Limitations of R's gtrends Function When Passing Multiple Vectors as Arguments

Mastering ddply: Powerful Data Manipulation in R with `data.table` Package