Creating Random Portfolios Using plyr and rportfolio in R

Transforming Long Data into Wide Format Using Tidyr in R: A Comprehensive Guide

Transposing Data with Long-to-Wide Transformation and Matching Pairs Using R: A Comparative Analysis of split() and do.call() Methods

Using Custom Aggregate Functions with cast() in R reshape2: A Practical Guide to Resolving the Limitation of vapply and fill=0