Understanding Stacked Bar Graphs in R with ggplot2: Adding Total Counts to the Y-Axis

Creating Categorical Variables in Regression Analysis using pandas and statsmodels: A Practical Guide to Handling Discrete Independent Variables with Multiple Categories

Extracting Coefficients from Linear Models with Categorical Variables in R

Understanding Data File Formats for Categorical Data in SPSS: A Guide to CSV, SDF, XML, and JSON Files