Counting Last Observations of Each Company with Specific Value in costat and Counting dlrsn per Year Using Dplyr in R.

Performing a Left Join on Two Data Frames Using Less-Than and Greater-Than Conditions in R with dplyr

Mastering Non-Equi Joins in Data Tables: A Step-by-Step Guide for Efficient Data Merging

Replacing Column Values in DataFrame if They Are Found in a Vector Using Vectorized Operations with R Code Examples.

Creating Unique IDs Using interaction() and unite() from Tidyverse: A Flexible Approach

Filtering Data in R with Complete Cases for Specific Columns

Understanding dplyr::case_when and its Execution Flow

Convert Duplicate Rows to One Row with Collapsed Values in a Single Column Separated by Semicolons

Understanding the Challenge: Counting Kicks in a Specific Distance Range Using Alternative Methods with R.

Merging Dataframes with Different Lengths Using qpcR