R Draw ggplot2 Plot with Lines & Points (Example) | Add Scatterplot Line

Graphics with ggplot2 Tutorial

Move Position of ggplot2 Legend in R (4 Examples) | Change Plot Layout

Control Size of ggplot2 Legend Items in R (Example) | Adjust Symbols

Create Legend in ggplot2 Plot in R (2 Examples) | Add Legends to Graph

ggplot2 Plot with Different Background Colors by Region in R (Example)

Draw ggplot2 Plot with Two Y-Axes & Different Scales in R (Example)

R Draw ggplot2 Plot of Data Frame Subset (Example) | Particular Rows