Saving plots (ggsave) in R Programming - Mini Project: Build & Apply

Saving plots with ggsave in R

📖 Scenario: You have created a simple plot in R using ggplot2. Now, you want to save this plot as an image file so you can share it or use it later.

🎯 Goal: Learn how to save a plot using the ggsave function in R.

📋 What You'll Learn

Create a basic plot using ggplot2

Set a filename to save the plot

Use ggsave to save the plot as a PNG file

Print a confirmation message after saving

💡 Why This Matters

🌍 Real World

Saving plots is important when you want to share your data visualizations with others or include them in reports and presentations.

💼 Career

Data analysts and scientists often save plots to communicate insights clearly and professionally.

1

Create a simple plot using ggplot2

Load the ggplot2 library and create a plot called my_plot using the built-in mtcars dataset. Plot mpg on the y-axis and wt on the x-axis with points.

R Programming

# Load ggplot2 and create a plot called my_plot
# Your code here

Need a hint?

Use library(ggplot2) to load the package. Then assign the plot to my_plot.

2

Set the filename to save the plot

Create a variable called filename and set it to the string "my_mtcars_plot.png".

R Programming

library(ggplot2)
my_plot <- ggplot(mtcars, aes(x = wt, y = mpg)) + geom_point()
# Create a variable filename with the value "my_mtcars_plot.png"
# Your code here

Need a hint?

Use filename <- "my_mtcars_plot.png" to set the file name.

3

Save the plot using ggsave

Use the ggsave function to save my_plot to the file named filename. Use default width and height.

R Programming

library(ggplot2)
my_plot <- ggplot(mtcars, aes(x = wt, y = mpg)) + geom_point()
filename <- "my_mtcars_plot.png"
# Save the plot using ggsave
# Your code here

Need a hint?

Call ggsave(filename, plot = my_plot) to save the plot.

4

Print confirmation message

Print the message "Plot saved as my_mtcars_plot.png" to confirm the plot was saved.

R Programming

library(ggplot2)
my_plot <- ggplot(mtcars, aes(x = wt, y = mpg)) + geom_point()
filename <- "my_mtcars_plot.png"
ggsave(filename, plot = my_plot)
# Print confirmation message
# Your code here

Need a hint?

Use print("Plot saved as my_mtcars_plot.png") to show the message.