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CS276: Information Retrieval and Web Search Pandu Nayak and Prabhakar Raghavan

CS276: Information Retrieval and Web Search Pandu Nayak and Prabhakar Raghavan Lecture 4: Index Construction. Plan. Last lecture: Dictionary data structures Tolerant retrieval Wildcards Spell correction Soundex This time: Index construction. n-z. a-hu. hy-m. $m. mace. madden. mo.

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Index Construction

Index Construction. Adapted from Lectures by Prabhakar Raghavan (Yahoo and Stanford) and Christopher Manning (Stanford). Index construction. How do we construct an index? What strategies can we use with limited main memory? Our Sample Corpus Number of docs = n = 1M Each doc has 1K terms

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Chapter 8: Searching and Sorting Arrays

Chapter 8: Searching and Sorting Arrays. 8.1. Introduction to Search Algorithms. Introduction to Search Algorithms. Search : locate an item in a list of information Two algorithms we will examine: Linear search Binary search. Linear Search. Also called the sequential search

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CS276: Information Retrieval and Web Search Pandu Nayak and Prabhakar Raghavan

Index Construction

Chapter 8: Searching and Sorting Arrays