Transforming a Dataset with R: Creating an Adjacency Matrix from Country-Value Pairs

Extracting Row Numbers and Values from R Matrix Sample Output Using names() Function

Transforming Wide-Format Data into Long-Format using Python's pandas Library

Computing and Pivoting Data with tidyr and dplyr in R: A Practical Guide for Unique Value Extraction

How to Concatenate Rows in a Pandas DataFrame: A New Version

Creating Concatenated Values from Previous Columns Using Pandas

Counting Distinct Values in Tuple Pairs of Two Columns from a Given pandas DataFrame

Extracting Diagonal Elements from Matrices in R Using Various Methods

Converting Time Variable from Character with Quarterly Frequency: A Step-by-Step Guide