Merging Dataframes without Duplicating Columns: A Guide with Left and Outer Joins

Computing Proportions of a Data Frame in R and Converting a Data Frame to a Table: A Step-by-Step Guide

Working with Tables in R: Creating a Table by Selecting the First Value and Adding the Others with a Formula

Expanding a Dataset by Two Variables Using Tidyr's expand Function

Removing Extraneous Characters from Variable Names in R: A Two-Method Approach

Selecting Columns with Maximum Value in Pandas DataFrames

Adding New Column to Pandas DataFrame Based on Multiple Conditions Using NumPy's np.select() Function

Converting Sys.Date() from UTC to GMT+2:00 in R: A Step-by-Step Guide

Grouping and Totaling Data in R Based on Two Groups Using aggregate() and xtabs() Functions

Efficiently Merge Data Frames Using R's dplyr Library for Age Group Assignment