Human Centered Data Science
John Alexis Guerra Gómez
@duto_guerra
https://johnguerra.co/viz/humanDataScience
Use spacebar and the arrows to advance slides
Data Science
What is it?
Data science is an inter-disciplinary field that uses scientific methods, processes, algorithms and systems to extract knowledge and insights from structured and unstructured data
Wikipedia
... to work effectively with heterogeneous, real-world data and to extract insights from the data using the latest tools and analytical methods.
UC Berkeley MIDS program brochure
However
When you search online this is what you see
Popularity
Data Science is way more than Machine Learning!
The purpose of visualization is insight, not pictures
The purpose of data analysis is insight, not (just) models
But what are insights?
- Deep understanding
- Meaningful
- Non obvious
- Actionable
- Based on data
My insights toolset?
What do I use?
Let me give you an example
Insights
What car should I buy?
Normal procedure
Ask friends and family
Problem
That's inferring statistics from a sample n=1
Better approach
Data based decisions
https://tucarro.com
Let's see how to analyse data
Data Analysis
Let's compare them with a real world example
How is Rappi doing on Twitter?
- 30k tweets in a week of 2019
Approach 1
😡😠😒😐😏😃🥰?
- Machine learning 🎩! ???
- Detects sentiment ! ???
I hired a data 🐒 (might be me)
Analyzed 180 tweets
- 😡😠😒😐😏😃🥰
Here are some of them
😐 -10%
😡 -80%
🥰 80%
😐 -10%
😐 -20%
🥰 90%
😒 -40%
😒 -30%
Would you hire this data 🐒?
Well, actually
- It wasn't a data 🐒
- It was a 💻
- Would you use it?
Well, actually, actually
- It wasn't just any computer
- It was ML as a service by Google
- It costs $$$
Will you trust it?
I don't
- Spanish is just too complicated
- These models are trained with 🇪🇸 examples
Approach 2
Approach 3
It's up to you!
- Interactivity 👉 Ask questions
- Slice and dice
- Overview first, Zoom/Filter, then details on demand
Rappi Dashboard Link 😉
¡No coma Machine Learning, coma 🍖!
My insights toolset?
How to build Visual Analytics interfaces
.svg)
Machine Learning?
What can you use ML for?
- Photos 🖼
- Videos 📹
- Document/Text Processing 📃
- Speech 👄👂🏼
- Structured data 💾?
What can I detect on photos 🖼?
- Objects 🐈 🐕 🍎
- Faces 👱🏽♂️👱♀️
- Celebrities 🍾
- Landmarks 🗼
- Text in images 🗼
Video 📹 is about the same but on streaming
How can I use it?
Develop locally
Pose Detection
https://johnguerra.co/viz/mlPose/Object Detection
https://johnguerra.co/viz/mlObject/How can I use it?
- Big companies 👉 ML as a service
- You pay per request 💵 ~US$1.0 per every 1000 requests
Demos
What can I do with documents 📃?
- OCR 🖼 → 🔤
- Sentiment analysis 😆😡
- Topic extraction 🟡🟠🟣
- Entities detection
- Political Affiliation? 👔🎉
- Psychological Profile?
Demos
What can I do with Speech 👄👂🏼?
- Speech recognition 👂🏼
- Speech generation 👄
Architectures?
How to build Visual Analytics tools?
- Web Based
- Interactive
- Visual
Remember
- Data Science is more than ML
- 👉🏼 Insights! 👈🏼
- ML is just another tool
- Visual Analytics empowers users