Draw Additional Minor Tick Marks without Labels in ggplot2 Plot in R (Example Code)

This article explains how to draw additional minor tick marks without labels in a ggplot2 plot in R.

Setting up the Example

data(iris)                     # Load 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 & load ggplot2
library("ggplot2")
my_plot <- ggplot(iris,        # Default axis tick marks
                  aes(x = Sepal.Length,
                      y = Sepal.Width)) +
  geom_point()
my_plot

r graph figure 1 draw additional minor tick marks without labels ggplot2 r

Example: Adding Tick Marks without Labels to ggplot2 Plot

my_plot +                      # Add further tick marks on y-axis
  scale_y_continuous(breaks = seq(2, 5, by = 0.2),
                     labels = c(2, rep("", 4),
                                3, rep("", 4),
                                4, rep("", 4),
                                5))

r graph figure 2 draw additional minor tick marks without labels ggplot2 r

Related Tutorials & Further Resources

Please find some related R programming tutorials below.

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