How to adjust DPI for export?
Description:
When you save plots as images, DPI (dots per inch) is what controls the quality and resolution of the output. DPI becomes especially important when you're preparing figures for presentations, research papers, or print publications.
● By default, Matplotlib saves figures at 100 DPI, which is fine for on-screen use but will look blurry when printed or zoomed in.
● Use the dpi parameter in plt.savefig() (e.g., dpi=300) to export high-resolution images.
● A DPI of 300 or above is standard for print-quality graphics.
● Combine this with bbox_inches='tight' to remove unnecessary white space from around your plot.
● Also note: if you’re working in Jupyter Notebook and your images look fuzzy, increasing the DPI can dramatically improve clarity.
Code Explanation:
● plt.plot(...): Plots a basic line chart.
● plt.title(...): Adds a title to the chart.
● plt.savefig("plot.png", dpi=300): Saves the chart as a PNG file with a resolution of 300 DPI.
● dpi=300: Sets the output image to high quality (suitable for print).
● plt.show(): Displays the chart window.
Program:
import matplotlib.pyplot as plt
plt.plot([1, 2, 3], [3, 2, 1])
plt.title("High-Resolution Plot")
plt.savefig("plot.png", dpi=300)
plt.show()
Output:
