Day 2: Introduction to
Visualizations
matplotlib
1
Visualization != Sexy Pictures
2
The Basics
blog.okcupid.com
3
Bar Graph
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4
http://blog.okcupid.com
Scatter Plot
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5
http://blog.okcupid.com
Line Graph
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6
http://blog.okcupid.com
Choropleth Plots
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7
http://blog.okcupid.com
Box Plots
8
matplotlib
Python’s version of Matlab plotting
9
How matplotlib Draws
10
Figure object
Figure
11
Subplot object
Subplot
Draw in here
Draw in here
Figure
12
figure.add_subplot(2, 3, 1)
2
rows
3 columns
13
figure.add_subplot(2, 3, 1)
2
rows
3 columns
14
figure.add_subplot(2, 3, 1)
2
rows
3 columns
15
figure.add_subplot(2, 3, 1)
1
2
rows
3 columns
16
Charting Library
•
•
•
•
subplot.bar()
subplot.plot()
subplot.scatter()
subplot.boxplot()
17
Lines
Subplot
Figure
18
Boxes
Subplot
Figure
19
Polygons
Subplot
Figure
20
Overlaps
Subplot
Figure
21
Overlaps
Subplot
Figure
22
Choropleth Plots
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23
http://blog.okcupid.com
No Easy Way
24
How Maps are Drawn
25
How Maps are Drawn
26
Helper Functions
FIPS
draw_county(subplot, county_id, color)
draw_state(subplot, state, color)
27
MIT OpenCourseWare
http://ocw.mit.edu
Resource: How to Process, Analyze and Visualize Data
Adam Marcus and Eugene Wu
The following may not correspond to a particular course on MIT OpenCourseWare, but has been
provided by the author as an individual learning resource.
For information about citing these materials or our Terms of Use, visit: http://ocw.mit.edu/terms.