Lære Saving and Exporting Plots

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When you create visualizations in R using ggplot2, you often need to share your work with others or include plots in reports and presentations. Exporting high-quality graphics is essential to ensure your visualizations remain clear, professional, and visually appealing in any medium. Low-resolution or poorly formatted images can make your insights difficult to interpret and reduce the impact of your data storytelling.


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# Saving a ggplot as a PNG file with default settings
library(ggplot2)
p <- ggplot(mtcars, aes(x = wt, y = mpg)) + geom_point()

# Save as PNG
ggsave("scatterplot.png", plot = p)

# Save as PDF with specific width and height (in inches)
ggsave("scatterplot.pdf", plot = p, width = 8, height = 6)

# Save as JPEG with higher resolution (dpi)
ggsave("scatterplot_highres.jpg", plot = p, dpi = 300)

When exporting and sharing your visualizations, consider the following best practices:

Choose a file format that fits your needs; use PNG or JPEG for presentations, and PDF or SVG for print or further editing;
Set the width, height, and resolution (dpi) to ensure your plot appears crisp in its final destination;
Use descriptive, consistent filenames to keep your files organized and easy to find;
Always check your exported plots for clarity, correct sizing, and formatting before sharing or embedding them in documents.

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Sektion 1. Kapitel 12