Transparent backgrounds in Matplotlib - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does setting a transparent background in a matplotlib plot do?

It makes the plot's background see-through, so whatever is behind the image can be seen through the empty parts.

beginner

How do you save a matplotlib figure with a transparent background?

Use the savefig() function with the argument transparent=True, like plt.savefig('file.png', transparent=True).

intermediate

Which file formats support transparent backgrounds when saving matplotlib figures?

Formats like PNG and SVG support transparency. Formats like JPEG do not support transparent backgrounds.

beginner

What is the default background color of a matplotlib figure if transparency is not set?

The default background color is white (or the default rcParams facecolor).

intermediate

Can you make only the axes background transparent but keep the figure background opaque in matplotlib?

Yes, by setting the axes patch alpha value or facecolor with transparency, while keeping the figure's facecolor opaque.

Which argument makes a matplotlib figure background transparent when saving?

A alpha=0

B bgcolor='transparent'

C transparent=True

D facecolor='none'

The savefig() function uses transparent=True to make the background transparent.

Which file format does NOT support transparent backgrounds?

A JPEG

B PNG

C SVG

D PDF

JPEG does not support transparency, unlike PNG and SVG.

What is the default background color of a matplotlib figure?

A Gray

B Black

C Transparent

D White

By default, matplotlib figures have a white background.

How can you make only the axes background transparent in matplotlib?

A Set axes patch facecolor with alpha < 1

B Set plt.axis('off')

C Use savefig(transparent=True)

D Set plt.figure(transparent=True)

You can set the axes patch facecolor with transparency to make only the axes background transparent.

Which matplotlib function is used to save a figure with transparency?

A plt.save()

B plt.savefig()

C plt.show()

D plt.plot()

plt.savefig() is used to save figures, and it supports the transparent argument.

Explain how to save a matplotlib plot with a transparent background and why you might want to do this.

Think about how transparent backgrounds help when placing images on different backgrounds.

Describe the difference between making the entire figure background transparent versus only the axes background transparent in matplotlib.

Consider the layers of a matplotlib plot: figure and axes.