Removing Black Lines from Fill Scale Legend using `geom_vline` and `geom_histogram` in R with ggplot2

Resolving RGL Package Errors: A Step-by-Step Guide to Installing zlib and Overcoming the "Pixmap Load: File Format Unsupported" Warning

Adding a Legend to a RiverPlot in R: A Step-by-Step Guide on Manually Specifying Color Palettes and Creating Annotations

Creating Grouped Violin Plots with Trend Lines Across Groups Using ggplot2 and Log10 Transformation

Removing the Color Scale Legend from Plot() of SPP Density in R: A Step-by-Step Solution

Understanding Legends in ggplot2: A Deep Dive

Extracting Coefficient Value from Legend in R Plots

Understanding ggraph and ggplot2 Color Legends: Troubleshooting Tips and Tricks

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