R How to Display a ggplot2 Plot when Running a Script (Example Code)

In this article, I’ll explain how to display ggplot2 plots within a running script in the R programming language.

Setting up the Example

data(iris)                # Loading iris
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")
for(i in 1:10) {          # Running for-loop in R
  if(i == 5) {
    my_plot <- ggplot(iris, aes(x = Petal.Length, y = Petal.Width)) + geom_point()
    my_plot
  }
}

After running the previous R syntax, no plot is shown.

Example: Return ggplot2 Graph within for-Loop with print() Function

We can show plots created within a for-loop using the print function in R:

for(i in 1:10) {          # Run for-loop again
  if(i == 5) {
    my_plot <- ggplot(iris, aes(x = Petal.Length, y = Petal.Width)) + geom_point()
    print(my_plot)        # Explicitly draw ggplot2 plot
  }
}

r graph figure 1 r display ggplot2 when running script

Leave a Reply

Your email address will not be published.

Fill out this field
Fill out this field
Please enter a valid email address.
You need to agree with the terms to proceed

Menu
Top