3D axes with projection='3d' in Matplotlib - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does setting projection='3d' do in matplotlib?

It creates a 3D plot by enabling three-dimensional axes, allowing you to plot data in 3D space instead of the usual 2D.

beginner

How do you import the module needed to create 3D plots in matplotlib?

You import <code>Axes3D</code> from <code>mpl_toolkits.mplot3d</code> or simply use <code>projection='3d'</code> when adding axes with <code>fig.add_subplot()</code>.

beginner

Which matplotlib function is used to add 3D axes to a figure?

Use fig.add_subplot(111, projection='3d') to add 3D axes to a figure.

intermediate

What are common plot types you can create with 3D axes in matplotlib?

You can create scatter plots, line plots, surface plots, and wireframe plots in 3D using methods like scatter(), plot(), plot_surface(), and plot_wireframe().

beginner

Why is 3D plotting useful in data science?

3D plotting helps visualize relationships between three variables, making it easier to understand complex data patterns and structures.

Which argument enables 3D plotting in matplotlib's add_subplot?

A projection='3d'

B type='3d'

C mode='3d'

D axis='3d'

The correct argument is projection='3d' to create 3D axes.

Which method is used to create a 3D scatter plot?

A ax.bar()

B ax.plot()

C ax.hist()

D ax.scatter()

ax.scatter() is used for scatter plots, including in 3D.

What does fig.add_subplot(111, projection='3d') return?

A A 2D axes object

B A 3D axes object

C A figure object

D A plot object

It returns a 3D axes object where you can plot 3D data.

Which library provides the Axes3D class for 3D plotting?

A numpy

B matplotlib.pyplot

C mpl_toolkits.mplot3d

D pandas

Axes3D is in mpl_toolkits.mplot3d.

Which of these is NOT a typical 3D plot type in matplotlib?

A plot_histogram

B plot_surface

C plot_wireframe

D scatter

plot_histogram is not a matplotlib 3D plotting method.

Explain how to create a 3D scatter plot using matplotlib.

Think about the steps from figure creation to plotting points in 3D.

Describe why and when you would use 3D axes with projection='3d' in data visualization.

Consider the benefits of adding a third dimension to plots.