Graphs Graphs Definitions Implementation/Representation of graphs - PowerPoint PPT Presentation

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CS171 Introduction to Computer Science II Science II Graphs Graphs Definitions Implementation/Representation of graphs Search Depth-first search Depth-first search Breadth-first search Applications Find a path

CS171 Introduction to Computer Science II Science II Graphs
Graphs � Definitions � Implementation/Representation of graphs � Search � Depth-first search � Depth-first search � Breadth-first search � Applications � Find a path � Connected component � Shortest path
Graph Search � Depth-first search � Finding a path � Connected components � Breadth-first search � Breadth-first search
Six degrees of separation � Everyone is on average approximately six steps away, by way of introduction, from any other person on Earth � Online social networks � Online social networks � Facebook: average distance is 4.74 (Nov 2011) � Twitter: average distance is 4.67 � Erdos number � Bacon number
Map Routing (Shortest Path)
Application : Web Search Engines �� i. Gather the contents of all web pages (using a program called a crawler or spider ) a program called a crawler or spider ) ii. Organize the contents of the pages in a way that allows efficient retrieval ( indexing ) iii. Take in a query, determine which pages match, and show the results ( ranking and display of results)
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Project � Option 1: The Emory MapQuest Project (TEMP) � Option 2: FaceSpace � Option 3: Oracle of Bacon (?) � Project workshop: May 1, 2012
Midterm Exam � Maximum: 101 � Mean: 86.57 � Median: 90.5

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