Creating Informative Scatterplots: Colored by Date with Legend

Creating a Fake Legend in ggplot: A Step-by-Step Guide Using qplot() and grid.arrange()

Customizing the Legend Labels in ggord: Alternatives and Solutions

Adding Boxes for NA Values in ggplot2 Legends for Continuous Maps

Understanding ggmap and ggplot2 Maps with Point Legends: A Comprehensive Guide to Creating Informative Geospatial Visualizations

Customizing Legend and Axis in R Plot with ggplot2: A Comprehensive Guide

Assigning a Custom Legend to a Pandas DataFrame Plot