Data Chatter Karthik Shashidhar

The phrase “using data to tell stories” is so commonly used nowadays that it runs the risk of becoming a cliche, if it hasn’t become one already. This episode’s guest flips this logic around - instead of using data to tell stories, he uses stories to teach data science!

Arvind Venkatadri is a faculty member at Srishti Manipal School of Art, Design and Technology. His research/teaching interests include TRIZ, Computation in R, Design using Open Source Electronics Hardware, and Complexity Science. He is part of the School of Foundation Studies at SMI.

This is a very wide ranging conversation. We talk about, among other things, The Three Musketeers, Lawrence of Arabia and Legally Blonde. We talk about how Arvind leverages all of these to teach his students data science and logic and game theory.

At a time when the field of data science is rife with “pile stirring”, where a large section of practitioners treat it as an extension of software engineering, Arvind’s approach, centred on stories and the human experience, is really refreshing. His approach also gives a pointer on how to widen the base in terms of attracting people into data science. 

I must apologise for one thing - this conversation was recorded during Deepavali in November 2021, so you can occasionally hear the sound of firecrackers in the background. I really hope you can get past that and listen to Arvind’s stories.



Show Notes

00:03:00: Arvind’s journey into teaching Data Science in an art school

00:05:45: Teaching data science to art students

00:15:45: Teaching statistics through art and stories. Wassily Kandinsky

00:23:00: Teaching coding through art

00:31:00: Shapes and colours and emotions

00:44:00: Lawrence of Arabia (can’t say more here in the description!)

00:50:00: Data science and the human experience



Links:

Arvind’s homepage

Arvind on Twitter

Arvind’s course on R for artists and designers

An intro to Wassily Kandinsky's work



Data Chatter is a podcast on all things data. It is a series of conversations with experts and industry leaders in data, and each week we aim to unpack a different compartment of the "data suitcase".

The podcast is hosted by Karthik Shashidhar. He is a blogger, newspaper columnist, book author and a former data and strategy consultant. Karthik currently heads Analytics and Business Intelligence for Delhivery, one of India’s largest logistics companies.

You can follow him on twitter at @karthiks, and read his blog at noenthuda.com

There is a conception, or misconception, that journalists are not good at maths. It is rather common to see newspaper headlines and graphics that make basic mathematical and logical errors.

On the other hand, in the last decade or so, we have seen a massive rise in “data journalism”. With more and more data being available, journalists are able to write stories exclusively based on data.

How do these two square off?

To answer this, we have Sukumar Ranganathan, editor in chief of the Hindustan Times. He was previously editor of Mint, of which he was one of the founding editors. It was while he was at Mint that he gave a big push to the then nascent field of “data journalism”, inviting writers such as HowIndiaLives, Rukmini S and myself to write data-backed pieces for Mint. He has previously worked in editorial leadership roles at The Hindu Businessline and Business Today.

Sukumar has degrees in chemical engineering, maths, and business administration, and is interested in mathematics, science and technology, the history of business, new media, and data-based political journalism. He reads and collects comic books and is an amateur birder. He tweets under the ID @HT_ed

Show Notes:

00:03:15: Are journalists really bad at maths?
00:16:30: Impact of bad data on public policy, and information theory
00:21:00: How data in journalism has changed in the last 20-25 years
00:23:00: The data journalism story
00:31:15: Judging a data story
00:45:30: Advice to budding data journalists

Data Chatter is a podcast on all things data. It is a series of conversations with experts and industry leaders in data, and each week we aim to unpack a different compartment of the "data suitcase".

The podcast is hosted by Karthik Shashidhar. He is a blogger, newspaper columnist, book author and a former data and strategy consultant. Karthik currently heads Analytics and Business Intelligence for Delhivery, one of India’s largest logistics companies.

You can follow him on twitter at @karthiks, and read his blog at noenthuda.com

There are two dominant programming languages used for data science nowadays - R and Python, each having its own set of loyal users. Both have their own strengths and weaknesses. In this episode, we look at what each langauge is good and bad at, what kind of people are more likely to use each, and how being able to program in both and switch seamlessly can indeed be a superpower.

Today’s guest is Abdul Majed Raja RS, a Data Scientist at Atlassian. Abdul Majed likes to call himself an Analytics Consultant with over a decade of experience helping organisations solve their business problems. He's also a Content Creator trying to help newcomers navigate the Data Science space easily and learn continuously. You can find him on Twitter and on Youtube at 1littlecoder. 



Show Notes: 

00:03:00: How Abdul got into analytics
00:05:30: MS Excel in data science
00:07:45: When to use R and when to use Python
00:17:00: What data scientists can learn from software engineers
00:24:30: Graphics and visualisations in R and Python
00:26:45: Machine learning in R and Python
00:29:15: Why the Indian market in Data Science leans towards Python
00:34:45: Working with databases
00:37:30: Building dashboards in R and Python
00:47:00: Working with R *and* Python at the same time
00:51:30: What about Excel and Julia?

Links

I don't like Notebooks - Joel Grus  - 

Interface between R and Python - reticulate.

Julia Silge Youtube Channel for latest Tidymodels tutorials

Advantages of Using R Notebooks For Data Analysis Instead of Jupyter Notebooks - Max Woolf



Data Chatter is a podcast on all things data. It is a series of conversations with experts and industry leaders in data, and each week we aim to unpack a different compartment of the "data suitcase".

The podcast is hosted by Karthik Shashidhar. He is a blogger, newspaper columnist, book author and a former data and strategy consultant. Karthik currently heads Analytics and Business Intelligence for Delhivery, one of India’s largest logistics companies.

You can follow him on twitter at @karthiks, and read his blog at noenthuda.com

Over the last decade, we have seen tremendous advances in big data, data science, artificial intelligence and machine learning. Every compnay wants to be a tech-first comapny now, and wants to “do data science". Companies can probably double their valuation by just adding a  “.ai" to their names. Companies that actually use artificial intelligence and machine learning maybe have an even higher premium on their valuations.

However, is Data Science worth the hype? Is AI going to take over the world?  And why is data science being eaten by computer science? What happned to classical analytics, operations resarch and statistics?

This week’s guest is someone who did data science even before the phrase had b een invented.

Amaresh Tripathy is SVP and Analytics Business Leader at Genpact. Till recently he was a Partner with PWC, leading the firm’s Data & Analytics Consulting, and helped build a $500mm business. Previously, Amaresh founded and co-led the Information and Analytics Practice for Diamond Management & Technology Consultants, and also serves as Adjunct Professor of Data Science and Business Analytics at the University of North Carolina, Charlotte.

Amaresh has helped Fortune 500 companies in multiple industries (healthcare, retail & consumer, communications) to help define and implement their analytics and AI strategies and institutionalize data enabled decision making.  He has led organizations to help embed analytics in their front, middle and back office functions and manage the change process.



Show Notes:

00:03:00: Definitions - data science, artificial intelligence, machine learning, etc.
00:04:15: The rise of computer science and machine learning
00:10:15: The probelm with Kaggle, and the “race for accuracy”
00:11:30: How to scale analytics without doing bad data analysis
00:18:00: How selling data science has changed over the last decade
00:23:00: The interaction between business and Data Science
00:26:30: “Creating bilinguals at scale”
00:30:30: Machine learning trying to eat data science
00:39:00: Comparing data science practices across countries

Links:

Thomas Davenport and DJ Patil on Data Science as the “sexiest job of the 21st century” (2012 article)

Hal Varian on statistics as a “sexy job”



Data Chatter is a podcast on all things data. It is a series of conversations with experts and industry leaders in data, and each week we aim to unpack a different compartment of the "data suitcase".

The podcast is hosted by Karthik Shashidhar. He is a blogger, newspaper columnist, book author and a former data and strategy consultant. Karthik currently heads Analytics and Business Intelligence for Delhivery, one of India’s largest logistics companies. 

You can follow him on twitter at @karthiks, and read his blog at noenthuda.com/blog

In this edition of data chatter, we will talk about maps. Maps are excellent devices for telling stories. Think of the maps you see around election times that show which parties won seats where. in fact, the first ever scatter plot - Dr. John Snow’s figure of cholera cases in London, was essentially a map. Or think of the famous map of Napoleon’s invasion of Russia.

And telling stories through maps is an exercise in data science. Data overlaid on maps can help tell really powerful stories. And as we learn in today’s conversation, the process of mapping is no diferent from the process of data science.

Our guest is Raj Bhagat Palanichamy, or as he calls himself “mapper for life”. Raj works for the World Resources Insitute India, where he leads projects on urban development, water resources and transport.

In this conversation, Raj talks about his journey into mapping, how he makes his maps, and how WWE influences the way he tells his stories.



Highlights:

00:03:00: Raj's journey into the world of maps and mapmaking
00:06:15: The process of creating maps to tell stories
00:12:30: Choosing colours
00:17:00: The importance of annotations in storytelling
00:23:15: Data, digitisation and tools
00:35:45: Taking inspiration from WWE to construct "stories" with maps
00:42:13: Mapping cities versus mapping landscapes
00:44:30: Where is mapping underrated and overrated?


Raj's 30 day map challenge in 2020

Data Chatter is a podcast on all things data. It is a series of conversations with experts and industry leaders in data, and each week we aim to unpack a different compartment of the "data suitcase".

The podcast is hosted by Karthik Shashidhar. He is a blogger, newspaper columnist, book author and a former data and strategy consultant. Karthik currently heads Analytics and Business Intelligence for Delhivery, one of India’s largest logistics companies. 

You can follow him on twitter at @karthiks, and read his blog at noenthuda.com/blog

The fundamental principle underlying all analytics and data science is Probability. And probability was first invented, or should I say discovered, to assess risk. So what is risk? Can we quantify and measure it? How do we handle risk in life? Is risk always bad?

Today’s guest on Data Chatter is Bala Vamsi Tatavarthy, who is co-founder and investment advisor at Aravali Asset Management, a global arbitrage fund.

Vamsi was my classmate at IIT Madras, where he studied computer science but spent most of his time gaming. He then went to IIM Ahmedabad, where he continued to game heavily and graduated with a gold medal. He now runs a hedge fund, and spends a lot of time gaming. 

Moreover, he was one of the last traders to trade on behalf of Lehman Brothers, on 15th September 2008. 

Risk, as you can imagine, is a vast subject, and so this is a long podcast. We talk about measuring risk, problems with too much measurement of risk, how risk can be managed, and all that. We also talk about movies, games, the differneces between poker and bridge and physics envy.

Show Notes

00:03:45: Defining Risk, and Lehman Brothers’ collapse

00:09:00: Can risk be created or destoryed? Is it conserved?

00:15:00: Risk, probability distributions and long tails

00:20:45: Uncertainty, volatility and risk

00:28:30: Hedging

00:35:00: Utility functions

00:42:30: Games and risk

00:54:00: Bridge and poker, and finite and infinite games

01:04:15: Ergodicity

01:07:30: VaR, Risk-metrics and Goodhart’s Law

01:14:30: Correlation

Links:

Finite and Infinite Games

“Risk once created cannot be destroyed”

The Wired article about Gaussian Copula, used to estimate correlations

Too Big To Fail, by Andrew Ross Sorkin

Ergodicity Economics 

Data Chatter is a podcast on all things data. It is a series of conversations with experts and industry leaders in data, and each week we aim to unpack a different compartment of the "data suitcase".

The podcast is hosted by Karthik Shashidhar. He is a blogger, newspaper columnist, book author and a former data and strategy consultant. Karthik currently heads Analytics and Business Intelligence for Delhivery, one of India’s largest logistics companies. 

You can follow him on twitter at @karthiks, and read his blog at noenthuda.com/blog