R Control Grid Lines of Axes in ggplot2 Graphic (Example Code)

data(iris)                     # Example data
head(iris)                     # Display head
#   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

data(iris) # Example data head(iris) # Display head # 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

install.packages("ggplot2") # Install ggplot2 package library("ggplot2") # Load ggplot2 package

my_plot <- ggplot(iris,        # Draw ggplot2 graphic with regular grid
                  aes(x = Sepal.Length,
                      y = Petal.Length)) +
  geom_point()
my_plot

my_plot <- ggplot(iris, # Draw ggplot2 graphic with regular grid aes(x = Sepal.Length, y = Petal.Length)) + geom_point() my_plot

my_plot +                      # Change major & minor grid lines
  theme(panel.grid.major.x = element_blank(),
        panel.grid.major.y = element_blank()) +
  scale_x_continuous(minor_breaks = seq(4, 6, 0.1)) +
  scale_y_continuous(minor_breaks = c(1.5, 5))

my_plot + # Change major & minor grid lines theme(panel.grid.major.x = element_blank(), panel.grid.major.y = element_blank()) + scale_x_continuous(minor_breaks = seq(4, 6, 0.1)) + scale_y_continuous(minor_breaks = c(1.5, 5))