Pick events for data interaction in Matplotlib - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a pick event in matplotlib?

A pick event happens when a user clicks on a part of a plot that is set to be 'pickable'. It allows interaction with plot elements like points or lines.

beginner

How do you make a plot element pickable in matplotlib?

You set the 'picker' parameter to True or a tolerance value when creating the plot element, for example: plt.plot(x, y, picker=True).

intermediate

Which matplotlib method connects a pick event to a function?

The 'figure.canvas.mpl_connect' method connects the 'pick_event' to a custom function that handles the event.

intermediate

What information can you get from a pick event object?

You can get the artist (plot element) picked, the mouse event details, and the indices of the picked data points.

beginner

Why are pick events useful in data visualization?

They let users interact with plots by clicking on data points or elements, enabling features like showing details, highlighting, or updating data dynamically.

What parameter makes a plot element respond to pick events in matplotlib?

A clickable

B selectable

C interactive

D picker

The 'picker' parameter enables pick events on plot elements.

Which function connects a pick event to a handler function?

A plt.connect_event()

B figure.canvas.mpl_connect()

C plt.pick_event()

D figure.connect_pick()

Use 'figure.canvas.mpl_connect()' to connect events like 'pick_event' to handlers.

What does the pick event object NOT provide?

A The artist picked

B Mouse event details

C The plot title

D Indices of picked data points

The pick event object does not provide the plot title.

How can you specify the sensitivity area for picking in matplotlib?

A By setting picker to a float value (tolerance)

B By setting pick_sensitivity parameter

C By changing the plot color

D By resizing the figure

Setting 'picker' to a float value defines the picking tolerance in points.

Pick events in matplotlib are mainly used to:

A Enable user interaction by clicking plot elements

B Change plot colors automatically

C Save plots to files

D Resize the plot window

Pick events allow users to interact with plot elements by clicking them.

Explain how to set up a pick event in matplotlib to respond when a user clicks on a data point.

Think about making elements pickable and linking an event to a function.

Describe what information you can access from the pick event object and how it can be used.

Consider what details help respond to user clicks on plots.