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Seven Sins of Data Science Newbie
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_themessier
March 10, 2018
Technology
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Seven Sins of Data Science Newbie
Presented at WiDS Mumbai 2018
_themessier
March 10, 2018
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Transcript
Seven Sins of a Newbie Data Science (and how not
to commit them) - Sarah Masud, Red Hat
About Me Github: sara-02 Blog: themessier.wordpress.com
Me Learning To Give Back: 1. Open Source Contributions 2.
Blogs 3. Meetups, Conferences 4. Mentorship 5. Program review committees
Let’s begin ;) Image: https://commons.wikimedia.org/wiki/File:DataScienceLogo.png
Image: https://chroniclesofanassistant.wordpress.com/2010/11/14/first-day-of-work/
Image: https://www.kdnuggets.com/2016/10/big-data-science-expectation-reality.html
1: The Problem Statement At College: “On a loan data-set,
using logistic regression determine if person will default or not.”
1: The Problem Statement At Work: “We have been collecting
these data points since past 3 years. See what can be done to monetize it.”
1: The Problem Statement Solution 1. Understand the business needs!
2. Then understand the data collected. 3. Finally translate the vague problem into a known one.
2: Show Me the data At College: “Use the data
from Kaggle, UCLA registry, Image-Net, Wikipedia...”
Image: https://me.me/i/show-me-the-data-9747283
2: Show Me the data At Work: “Use whatever data
is legally available, but get this problem solved!”
2: Show Me the data Solution: 1. Don’t expect someone
to give you the data willingly! 2. Learn to deal with lack of labelled data. 3. Learn Web Scraping/Data ingestion pipelines.
3. Using A Missile Gun To Kill The Chicken At
College: “Sounds cool! Let me use this SOTA algorithm.”
Image: https://pbs.twimg.com/media/B83v847CUAAQHKg.jpg:large
3. Using A Missile Gun To Kill The Chicken At
Work: “Provide us with a cheap, accurate, stable solution.”
Image: https://www.someecards.com/usercards/viewcard/if-you-torture-the-data-they-will-confess-94dd7
3. Using A Missile Gun To Kill The Chicken Solutions:
1. Not every problem needs to be a DS problem! 2. Use switch cases if that is enough. 3. Understand the business constraints.
4: The Value of Your Work At College: 1. Accuracy
of model. 2. Number of research papers. 3. Subject grade!
4: The Value of Your Work At work 1. RoI.
2. RoI. 3. RoI.
Image: https://me.me/i/show-me-the-money-memes-11885126
4: The Value of Your Work Solution: 1. Understand the
business. 2. Optimise for Accuracy vs Cost. 3. Keep the end user in mind.
5: Serving the model At College “It about building most
accurate system, running it from the terminal. And that is it!”
5: Serving the model At Work: 1. How many concurrent
users can we serve? 2. What time delay can we afford, before we lose the customer?
5: Serving the model Industry: 1. How is the model
exposed to UI? 2. Can the model be distributed? 3. Can the model scale with increase in data?
6. Know Thy Audience At College: “Technical mentors, peers.”
6. Know Thy Audience At Work: “Audience is always a
mixed Baggage.”
6. Know Thy Audience Solution: 1. Know you concepts well.
2. Teaching DS to your grandma style of conversations.
Image: http://www.combine-lab.com/if-you-cant-explain-it-simply-you-dont-understand-it-well-enough/
7. Entropy sets in At College: “Build once, use once,
and then forget it!”
7. Entropy sets in At Work: “The same model and
code can be used in production for years without replacement.”
7. Entropy sets in Solution: 1. Build scalable robust models.
2. Perform regular model evaluation. 3. Re-train the model from time to time.
Love the problem, not your solution. Learn to Unlearn →
Relearn → Remodel. BECAUSE ...
Image: https://www.cafepress.com/+entropy_always_wins_3_shot_glass,1289685014
Thank You Q & A