How to Apply the grid() Function in R (Example Code)

In this tutorial you’ll learn how to apply the grid function in R programming.

Creating Example Data

data(iris)                     # 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

Example: Apply grid() Function to Add Grid on Top of Base R Plot

plot(iris$Sepal.Length,        # Draw scatterplot of iris data
     iris$Sepal.Width)
grid(5, 7,                     # Overlay grid with color & manual line type
     col = "purple",
     lty = "dashed",
     lwd = 3)

r graph figure 1 apply grid function

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