Creating Informative Scatterplots: Colored by Date with Legend

Merging Legends in ggplot2: A Single Legend for Multiple Scales

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

Analyzing Anomalies in `ratio` Data: Uncovering Issues with Data Collection and Labeling in Element Measurements

Adding a Legend to Geom_Polygon Layers in ggplot2: A Customizable Approach