Using car to Recode Across Range of Columns in R

Extracting Diagonal Elements from Matrices in R Using Various Methods

Arrange Rows in a Data Frame Based on Matching Values in Two Columns

Optimized Solution for Finding Nearest Previous Higher Element in Vectors Using Rcpp

Joining Data Tables on All Columns Using R's data.table Package

Efficiently Collapsing Large Vectors into Data Tables with RLEID Function

Performing Non-Equi Inner Joins on Data Ranges with data.table in R

Passing the Environment of a Row from a data.table to a Function in R

Optimizing Row Filtering with OR Conditions in Data.table

Selecting Values Below and After a Certain Value in a DataFrame