Rolling Cross-Join on Portfolios Dataset to Impute Missing Shares in a Forward Manner Using R.

Removing Grouping Variables with R: Efficient Data Table Wrangling Strategies

Finding the Nearest Date in R using Data Tables and VLOOKUP

Replacing Outlier Values with Second Minimum Value in R Using `replace` Function or Custom Expressions

Calculating the Moving Average of a Data Table with Multiple Columns in R Using Zoo and Dplyr

Substituting Expressions into the `j` Element in Data.table with `data.table[, j, by]`

Efficiently Counting Unique Purchases Per Customer with R's data.table Package

Joining Datatables Based on Two Values Using the Data.table Package in R

Data Manipulation with data.table in R: A Comprehensive Guide to Updating Values Based on Conditions

Shuffle and Randomize Columns of a Data Table in R Using data.table