Set Fixed Continuous Colour Values in ggplot2 Plot in R (Example Code)
This article shows how to adjust the continuous color range in a ggplot2 plot in the R programming language.
Setting up the Example
data(iris) # Loading example data head(iris) # Sepal.Length Sepal.Width Petal.Length Petal.Width Species # 1 5.1 3.5 1.4 0.2 setosa # 2 4.9 3.0 1.4 0.2 setosa # 3 4.7 3.2 1.3 0.2 setosa # 4 4.6 3.1 1.5 0.2 setosa # 5 5.0 3.6 1.4 0.2 setosa # 6 5.4 3.9 1.7 0.4 setosa |
install.packages("ggplot2") # Install ggplot2 package library("ggplot2") # Load ggplot2 package |
my_plot <- ggplot(iris, # ggplot2 plot with default color range aes(x = Sepal.Length, y = Sepal.Width, color = Petal.Length)) + geom_point() my_plot |
Example: Change Continuous Color Range in ggplot2 Plot Using scale_colour_gradientn() Function
my_plot + # Adjust color range scale_colour_gradientn(colors = 1:6) |
Further Resources & Related Tutorials
You may find some related R programming tutorials below.