COMP 250 INTRODUCTION TO COMPUTER SCIENCE Week 9-2 : Recursion 1 Giulia Alberini, Fall 2020 WHAT ARE WE GOING TO DO IN THIS VIDEO? Recursive algorithms EXAMPLE public static void countdown(int n) { if (n == 0) { System.out.print(“Go!”); } else { System.out.print(n + “ ”); countdown(n-1); } } What prints if we call […]
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CSE 4502/5717 Big Data Analytics Fall 2020 Exam 3 Helpsheet 1. Let f : Rn → R be any function on n variables. Given a series of examples to learn f, we can fit them using a linear model: f(x1,x2,…,xn)=w1x1+w2x2+···+wnxn. Linearregressioncomputestheoptimalvaluesfortheparameters by equating the gradient to zero. Let the examples be (x1i ,x2i ,…,xni ;yi)
Binary Search Tree Juan Zhai juan.zhai@rutgers.edu Watch the videos first and then come back • BST structure and search: https://www.youtube.com/watch?v=J3YY- Ef2xlE&ab_channel=SeshVenugopal • BST insert: https://www.youtube.com/watch?v=BVeEmH 26PQ4&ab_channel=SeshVenugopal • BST delete: https://www.youtube.com/watch?v=3TOl3Fv4 394&ab_channel=SeshVenugopal Juan Zhai, juan.zhai@Rutgers.edu 2 /** This interface imposes a total ordering on the objects * of each class that implements it. */ public interface
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Final Exam: Econ/FM 9587 Instructor: Jim MacGee and Matt Davison and Nazmul Ahsan Monday, December 10, 2018 9:30-11:30 Name: Student I.D. Instructions 1. This is an closed book exam: you are not permitted to refer to any textbooks, notes or papers/manuscripts or to communicate with any living entity while writing the exam – doing so
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COMP 250 INTRODUCTION TO COMPUTER SCIENCE Week 11-3 : Binary Trees Giulia Alberini, Fall 2020 Slides adapted from Michael Langer’s WHAT ARE WE GOING TO DO IN THIS VIDEO? Binary Trees Expression Trees BINARY TREES BINARY TREES Each node has at most 2 children! BINARY TREES Q: What is the maximum number of nodes 𝑛
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CS 112: Data Structures Sesh Venugopal Topological Sorting of Graphs Using DFS or BFS Precedence Graph A precedence graph is a Directed Acyclic Graph (DAG), i.e. a directed graph that does not have any cycles BBB AAA CCC acyclic has cycle has cycle An edge xày means that x precedes y. Precedence graphs are used
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CS 112: Data Structures Sesh Venugopal Dijkstra’s Shortest Path Algorithm for Graphs Shortest Path Numerous graph applications need to know what is the shortest path from point A to point B. If the graph does not have edge weights, this is not a hard problem to solve (think of using DFS or BFS) But when
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COMP 250 INTRODUCTION TO COMPUTER SCIENCE Week 12-2 : Heaps Giulia Alberini, Fall 2020 Slides adapted from Michael Langer’s WHAT ARE WE GOING TO DO IN THIS VIDEO? Heaps HEAPS PRIORITY QUEUE Assume a set of comparable elements or “keys”. Like a queue, but now we have a more general definition of which element
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COMP 250 INTRODUCTION TO COMPUTER SCIENCE Week 7-2 : Queues Giulia Alberini, Fall 2020 Slides adapted from Michael Langer’s WHAT ARE WE GOING TO DO IN THIS VIDEO? Queues ADT (ABSTRACT DATA TYPE) List add(i, e), remove(i), get(i), set(i), ….. Stack push(e) , pop(), .. Queue enqueue(e), dequeue() QUEUE dequeue (remove
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COMP 250 INTRODUCTION TO COMPUTER SCIENCE Week 12-1 : Binary Search Trees Giulia Alberini, Fall 2020 Slides adapted from Michael Langer’s WHAT ARE WE GOING TO DO IN THIS VIDEO? Binary Search Trees BINARY SEARCH TREES BSTNode The keys are “comparable” e.g. numbers, strings. class BSTNode{ K key; BSTNode leftchild; BSTNode rightchild; : }
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