Introduction to Data Science 5-13.pptx
- 1. Introduction to Data Science NILESH KUMAR
- 2. Outline Data, Big Data and Challenges Data Science Introduction Why Data Science Data Scientists What do they do? Major/Concentration in Data Science What courses to take.
- 3. Data All Around Lots of data is being collected and warehoused Web data, e-commerce Financial transactions, bank/credit transactions Online trading and purchasing Social Network
- 4. How Much Data Do We have? Google processes 20 PB a day (2008) Facebook has 60 TB of daily logs eBay has 6.5 PB of user data + 50 TB/day (5/2009) 1000 genomes project: 200 TB Cost of 1 TB of disk: $35 Time to read 1 TB disk: 3 hrs (100 MB/s)
- 5. Big Data Big Data is any data that is expensive to manage and hard to extract value from Volume The size of the data Velocity The latency of data processing relative to the growing demand for interactivity Variety and Complexity the diversity of sources, formats, quality, structures.
- 6. Big Data
- 7. Types of Data We Have Relational Data (Tables/Transaction/Legacy Data) Text Data (Web) Semi-structured Data (XML) Graph Data Social Network, Semantic Web (RDF), … Streaming Data You can afford to scan the data once
- 8. What To Do With These Data? Aggregation and Statistics Data warehousing and OLAP Indexing, Searching, and Querying Keyword based search Pattern matching (XML/RDF) Knowledge discovery Data Mining Statistical Modeling
- 9. What is Data Science? An area that manages, manipulates, extracts, and interprets knowledge from tremendous amount of data Data science (DS) is a multidisciplinary field of study with goal to address the challenges in big data Data science principles apply to all data – big and small https://hbr.org/2012/10/data-scientist-the-sexiest-job-of-the-21st-century/
- 10. What is Data Science? Theories and techniques from many fields and disciplines are used to investigate and analyze a large amount of data to help decision makers in many industries such as science, engineering, economics, politics, finance, and education Computer Science Pattern recognition, visualization, data warehousing, High performance computing, Databases, AI Mathematics Mathematical Modeling Statistics Statistical and Stochastic modeling, Probability.
- 11. Data Science
- 12. Data Science
- 13. Real Life Examples Companies learn your secrets, shopping patterns, and preferences For example, can we know if a woman is pregnant, even if she doesn’t want us to know? Target case study Data Science and election (2008, 2012) 1 million people installed the Obama Facebook app that gave access to info on “friends”
- 14. Data Scientists Data Scientist The Sexiest Job of the 21st Century They find stories, extract knowledge. They are not reporters
- 15. Data Scientists Data scientists are the key to realizing the opportunities presented by big data. They bring structure to it, find compelling patterns in it, and advise executives on the implications for products, processes, and decisions
- 16. What do Data Scientists do? National Security Cyber Security Business Analytics Engineering Healthcare And more ….
- 17. Concentration in Data Science Mathematics and Applied Mathematics Applied Statistics/Data Analysis Solid Programming Skills (R, Python, Julia, SQL) Data Mining Data Base Storage and Management Machine Learning and discovery