Accessing Columns of a Matrix Using the Entries of Another Matrix R

Performing Polynomial Function Expansion in R with the Built-in `polym` Function

Matrix Operations in R: Calculating the Sum of Product of Two Columns

Deleting Columns and Rows from a Kinship Matrix in R Using dimnames and Subset Methods

Combining and Ranking Rows with Columns from Two Matrices in R: A Step-by-Step Solution

Sorting and Filtering TDM Matrices in R: A Comprehensive Guide

Understanding Matrix Column Exchange in R: An Efficient Approach with Pivot Index