How to Calculate Elapsed Time Between Consecutive Measurements in a DataFrame with R and Dplyr

Modifying Data Table in R Using Nested For Loops to Replace Characters with Calculated Values

Merging Two R Dataframes While Keeping Matched Rows from the Second DataFrame and Unmatched Rows from the First

How to Efficiently Use Data Tables in R for Analysis and Manipulation of Datasets

Updating Missing Values in One Data Table Using Another Data Table