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LECTURE NOTES ON DATA PREPARATION AND ANALYSIS …

LECTURE NOTES ON data PREPARATION AND ANALYSIS (BCSB13) Prepared by, G. Sulakshana, Assistant Professor, CSE Dept. DEPARTMENT OF COMPUTER SCIENCE AND ENGINEERING INSTITUTE OF AERONAUTICAL ENGINEERING (Autonomous) Dundigal, Hyderabad- 500043 MODULE -I data GATHERING AND PREPARATION BIG data ANALYTICS: The volume of data that one has to deal has exploded to unimaginable levels in the past decade, and at the same time, the price of data storage has systematically reduced. Private companies and research institutions capture terabytes of data about their users interactions, business, social media, and also sensors from devices such as mobile phones and automobiles.

deliver the resultant data product. Data gathering is a non-trivial step of the process; it normally involves gathering unstructured data from different sources. To give an example, it could involve writing a crawler to retrieve reviews from a website. This involves dealing with text,

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