Data Visualization: A Quick Tour for Data Science Enthusiasts

Krist Wongsuphasawat /@kristw

visualizationdataA quick tour for data science enthusiasts

visualizationdataWhat is it about?

What is it good for?

How is it related to data science?

Example projects

…

1. What is it about?

“A picture is worth more than a thousand words.”

— ใครสักคนได้กล่าวไว้

Data Picture

Data Visual display

Help audience consume a lot of information rapidlyData Visual display

2. What is it good for?

Example / History

data

location (lat,lon => x,y), quantity of troops (width), direction (color) time (x), temperature (y)

Example / Cholera epidemic

List of deceased patients !

Mr. Smith, who lived at 11 Sunny St. Miss White, who lived at 23 Cloudy Rd.

Mr. Jones, who lived at 30 Rainy St. Mrs. Robinson, who lived at 34 Windy Rd.

…

data

John Snow

What is it good for?

Storytelling Communicate known information

Exploratory data analysis Explore data to reveal insights

More powerfulVisualization = Visual display + Interaction

3. How is it related to data science?

Turn data into

valuable insightsdata product

interesting stories

data wrangling

output insights, products, stories

exploratory data analysis

report results

raw data

in-depth analysis

data wrangling

output insights, products, stories

exploratory data analysis

report results

in-depth analysis

communication, storytelling

raw data

4. Example projects

4.1 Ballon d’Or

FIFA released voting data

• 3 voters / country

• National team captain

• National team coach

• Journalist (media)

• Each voter select 3 players for 1st, 2nd and 3rd place

Rules

data wrangling

output insights, products, stories

exploratory data analysis

report results

in-depth analysis

communication, storytelling

raw data

• Given data are tables in PDF.

• Extract to csv

• Format data to desired format.

Data Wrangling

Demo / Ballon d’Orhttps://medium.com/@kristw/who-voted-for-who-diving-into-ballon-dor-voting-data-e09138ba9712

4.2 Public-facing vis & New year 2013

interactive.twitter.com

GeoHeatmap

Low density

High density

GeoSan Francisco

flickr.com/photos/twitteroffice/8798020541

Low density

High density

GeoSan Francisco

Rebuild the world based on

tweet volumes

twitter.github.io/interactive/andes/

How are these phrases used in Tweets? Is there any pattern?

data wrangling

output insights, products, stories

exploratory data analysis

report results

in-depth analysis

communication, storytelling

raw data

Big data wrangling

Having all TweetsHow people think I feel.

How people think I feel. How I really feel.

Having all Tweets

• Too much data, want only relevant Tweets

• contain “สวัสดีปีใหม่”

• variations: หวัดดีปีใหม่, หวัดดีปีหม่ายยย

• typos: หวัดตีปีใหม่

• Need to aggregate & reduce size

• Long processing time (hours)

Challenges

Hadoop ClusterData Storage

Workflow

Hadoop Cluster

Pig / Hive / Scalding (slow)

Data Storage

Tool

Workflow

Hadoop Cluster

Pig / Hive / Scalding (slow)

Data Storage

Tool

Workflow

Hadoop Cluster

Pig / Hive / Scalding (slow)

Data Storage

Tool

Smaller datasetYour laptop

Workflow

Hadoop Cluster

Pig / Hive / Scalding (slow)

Data Storage

Tool

Final dataset

Tool node.js / python / etc. (fast)

Your laptop

Workflow

Smaller dataset

Exploratory Data Analysis

Improve design for releasing to public

Demo / New Year 2013twitter.github.io/interactive/newyear2014/

Another fun fact: Developed using 2012 data

Then update data on Jan 2, 2013

4.3 Data Analysis Tool

data wrangling

output insights, products, stories

exploratory data analysis

report results

in-depth analysis

communication, storytelling

raw data

Logging user activities

UsersUseTwitter

UsersUse

Product Managers

Curious

Twitter

UsersUse

Curious

Engineers

Log datain Hadoop Write Twitter

Instrument

Product Managers

What are being logged?

tweetactivities

What are being logged?

tweet from home timeline on twitter.com tweet from search page on iPhone

activities

What are being logged?

tweet from home timeline on twitter.com tweet from search page on iPhone

sign up log in

retweet etc.

activities

Organize?

log event a.k.a. “client event”

[Lee et al. 2012]

log event a.k.a. “client event”

client : page : section : component : element : actionweb : home : timeline : tweet_box : button : tweet

1) User ID 2) Timestamp 3) Event name

4) Event detail

[Lee et al. 2012]

Twitter for Banana

Count page visits

banana : home : - : - : - : impressionhome page

User sessionsSession#1

A

B

start

end

Session#4

start

end

A

Session#2

B

start

end

A

Session#3

C

start

end

Aclient event

client event

Funnel

home page

profile page

Funnel analysis

banana : home : - : - : - : impression

banana : profile : - : - : - : impression

1 jobhome page

profile page

1 hour

Funnel analysis

banana : home : - : - : - : impression

banana : profile : - : - : - : impression banana : search : - : - : - : impression

home page

profile page search page

2 jobs2 hours

Funnel analysis

banana : home : - : - : - : impression

banana : profile : - : - : - : impression banana : search : - : - : - : impression

home page

profile page search page

Specify all funnels manually!

n jobsn hours

Goal

banana : home : - : - : - : impression

… ……

1 job => all funnels, visualized

home page

User sessionsSession#1

A

B

start

end

Session#4

start

end

A

Session#2

B

start

end

A

Session#3

C

start

end

A

Aggregate4 sessions

A

BB C

start

end endend

A A

end

A

Aggregate

A

BB C

start

end endend

end

4 sessions

Aggregate

C

start

end endend

end

A

B

4 sessions

Aggregate

C

start

end endend

end

A

B

4 sessions

Aggregate

C

start

end endend

A

B end

4 sessions

Aggregate

C

start

endend

A

B end

4 sessions

Aggregate

C

start

endend

A

B end

4 sessions

Aggregate

start

endend

A

CB end

4 sessions

Aggregate

4,000,000 sessions

endend

A

CB end

start

Demo / Flying SessionsUsing Visualizations to Monitor Changes and Harvest Insights from a Global-Scale Logging

Infrastructure at Twitter by Krist Wongsuphasawat and Jimmy Lin. in Proc. IEEE Conference on Visual Analytics Science and Technology (VAST), Paris, France, 13 November, 2014

visualizationdataWhat is it about?

Data => Visual display + Interaction

What is it good for? Exploratory data analysis & storytelling

How is it related to data science? It is one of the skills often utilized in the process.

Example projects

interactive.twitter.com @kristw / kristw.yellowpigz.com

Thank you

Questions?