Saving plots (ggsave) in R Programming - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of the ggsave() function in R?

ggsave() saves a plot created with ggplot2 to a file on your computer, like a PNG or PDF.

beginner

Which argument in ggsave() specifies the filename and file type?

The filename argument sets the name and extension (like "plot.png") to decide the file type.

beginner

How do you save the last plot you made using ggsave() without specifying the plot object?

If you don't give a plot to ggsave(), it saves the last plot you displayed.

intermediate

What arguments control the size of the saved plot in ggsave()?

width and height set the size of the saved image, usually in inches.

intermediate

Can ggsave() save plots in formats other than PNG? Name two.

Yes! It can save as PDF, JPEG, TIFF, SVG, and more, depending on the file extension you use.

What happens if you call ggsave("myplot.pdf") without specifying a plot?

A It opens a dialog to select a plot.

B It throws an error because no plot is specified.

C It saves an empty file.

D It saves the last plot you created.

If no plot is given, ggsave() saves the last plot displayed.

Which argument do you use to change the width of the saved plot in ggsave()?

A size

B width

C length

D scale

The width argument sets the width of the saved image.

If you want to save a plot as a PNG file, what should the filename end with?

A .png

B .jpeg

C .pdf

D .txt

The filename should end with .png to save as a PNG image.

Which package must be loaded to use ggsave()?

A dplyr

B shiny

C ggplot2

D tidyr

ggsave() is part of the ggplot2 package.

What does ggsave("plot.svg", plot = myplot) do?

A Saves the plot object <code>myplot</code> as an SVG file.

B Saves the last plot as SVG.

C Saves the plot as a PNG file.

D Throws an error because SVG is not supported.

This saves the plot stored in myplot as an SVG file named "plot.svg".

Explain how to save a ggplot as a PDF file with a custom width and height using ggsave().

Think about the filename and size arguments.

Describe what happens if you call ggsave() without specifying a plot and how you can save a specific plot instead.

Consider the default behavior and how to override it.