Customizing Legend Linetype for Groups in ggplot2

Adding Legend and Smoothing to a Graph with ggplot2 in R: A Step-by-Step Guide

Creating Informative Scatterplots: Colored by Date with Legend

Customizing Legend Positioning in R Plots: A Step-by-Step Guide

Creating Custom Legends in ggplot2: A Comprehensive Guide

Understanding Legends in ggplot2: A Deep Dive

Manipulating Labels, Legends, Spacing in Parallel Coordinate Plots with grid.arrange

Reducing Legend Key Labels in ggplot2: A Simple Solution to Simplify Data Visualization

Customizing Legends in R: A Step-by-Step Guide to Creating Separate Legends for T_level and P_bars Variables

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