Let your data speak!

Anscombe dataset

Exploratory data analysis

The greatest value of a picture is when it forces us to notice what we never expected to see.

Visual presentation

Interactive presentation

John Hunter (1968 - 2012)

Backends

TkAgg	Qt4Agg	WebAgg

Antigrain geometry

pyplot interface

 
import matplotlib.pyplot as plt
plt.figure()
plt.subplot(...)
plt.plot(...) 
plt.show()
        

pyplot is a stateful interface that handles much of the boilerplate for creating figures and axes and connecting them to the backend of your choice, and maintains module-level internal data structures representing the current figure and axes to which to direct plotting commands.

Recap

Artists

Design points

Signal-to-noise ratio

Recap

Stem-and-leaf plot

1.1 2.2 2.8 3.2 3.4 3.4 3.5 4.1 4.9 5.5 5.7

Boxplots

Transforms

Recap

Small multiplies

Use of color

Visual illusion

Matplotlib colormaps

Recap

Principal component analysis

K-means clustering

Visual encoding channels

Recap

Map projections

Choropleth map

Recap