# Cornell | CS 1109

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##### Professors:

Raghuram Ramanujan, Ramanujan, Erdal Yilmaz

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###### qz3
Course: CS 1109
School: Cornell

1 Sorting (100 points) The following code sorts an array using an algorithm called bubblesort. function x = bubblesort(x) disp(= INPUT ARRAY =) fprintf(Array x) ); disp(x) disp(=) n = length(x); step = 0; for i=1:n-1 for j=1:n-i if x(j) > x(j+1) temp = x(

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###### qz2a
Course: CS 1109
School: Cornell

QUIZ 2 Name:_ netID:_ Tick the correct output. Some questions have been marked as Multiple choice, the rest have one correct answer. 1. i = 1; while (i < 10) i=i+1 end A. Numbers from 2 to 10 C. No output B. Numbers from 1 to 10 D. Numbers from 1 to 11 2.

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###### qz1a
Course: CS 1109
School: Cornell

Quiz 1 CS 1109 1 Assignment x y z x y = = = = = Date: June 26, 2013 (5 points) 6; 3; x / y; x - y; z + 2 * x; What are the nal values for x: 2 y: z: MATLAB functions (5 points) phi = 2*pi; theta = phi/2; st = sin(theta); val = exp(st); % theta = 2*theta;

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###### quiz5-sol
Course: CS 1109
School: Cornell

CS 1109 Summer 2011 Quiz 5 Solutions July 28 Name: NetID: You have 10 minutes to complete this quiz. You may not use a computer to answer the questions. 1. What are the two main dierences between Matlab functions and scripts? [Ans] (a) A Matlab function c

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###### hw4_sol
Course: CS 1109
School: Cornell

CS 1109 1 1.1 Homework 4 - Solution August 6, 2012 Sound Eects Delay function result = delay(data, fs, delta) % Delays the sound stored in data by an amount delta given in seconds. % Each data point is seperated by 1/fs seconds. dn = floor(delta * fs); re

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###### hw3_sol
Course: CS 1109
School: Cornell

Homework 3 - Solutions CS 1109 1 1.a July 29, 2013 Chess Initialization Initialization can be written as a simple assignment. function board = initialize() % Returns an initialized chessboard board = [ 8 7 0 0 0 0 1 2 1.b 9 10 11 12 10 77777 00000 00000 0

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###### hw2_sol
Course: CS 1109
School: Cornell

CS 1109 1 Homework 2 - Solution July 16, 2013 Mind the gap function p = prime gap(n,d) % Returns the prime numbers separated by a gap d and smaller than n. % p is an array which contains pairs of primes in order. x = primes(n); m = length(x) 1; p = []; %

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###### hw1_sol
Course: CS 1109
School: Cornell

CS 1109 1 1.a Homework 1 - Solution July 8, 2013 Spherical Triangle Area and Excess In this part all you have to do is to transfer the given mathematical formulas into assignments using arithmetic operators in MATLAB. When you run the script le, test tria

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###### lab1-sol
Course: CS 1109
School: Cornell

CS 1109 Summer 2011 Lab 1 Solutions June 28 Matlab Starting Matlab How to start Matlab: In the CIT public Windows labs, Matlab can be started by selecting Start All Programs Class Files MATLAB R2010a MATLAB R2010a. Anatomy of the Matlab Environment Purpo

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###### lab1
Course: CS 1109
School: Cornell

CS 1109 Summer 2011 Lab 1 June 28 In this lab, you will be introduced to Matlab (short for MATrix LABoratory ). You will also learn about two of the most fundamental building blocks of computer programs variables and assignment statements. General Lab Ins

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###### hw0
Course: CS 1109
School: Cornell

CS 1109 Summer 2011 Homework 0 Due: June 28, 10:00AM The purpose of this assignment is to introduce you to the Computer Science departments Course Management System (CMS). You will be using this portal over the course of the summer to submit your homework

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###### lab2
Course: CS 1109
School: Cornell

CS 1109 Summer 2011 Lab 2 June 30 In this lab, you will learn how to solicit input from a user and print output to the screen in Matlab. You will also learn how to create simple Matlab scripts. General Lab Instructions This lab is designed to be completed

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###### quiz1-sol
Course: CS 1109
School: Cornell

CS 1109 Summer 2011 Quiz 1 Solutions June 30 Name: NetID: You have 10 minutes to complete this quiz. You may not use a computer to answer the questions. 1. In a step-by-step fashion, describe how an assignment statement of the form variable name = express

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###### hw2
Course: CS 1109
School: Cornell

CS 1109 Summer 2011 Homework 2 Due: July 11, 11:59PM Instructions The purpose of this assignment is to help you gain experience in writing scripts that make use of branching and looping constructs. Remember: You are allowed to discuss the homework with ot

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###### lab2-sol
Course: CS 1109
School: Cornell

CS 1109 Summer 2011 Lab 2 Solutions July 1 Obtaining User Input The \ is an escape character that introduces a newline into a string. Strings To prompt a user for string input, we supply a second argument to the input command that is simply s. For exampl

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###### lab3
Course: CS 1109
School: Cornell

CS 1109 Summer 2011 Lab 3 July 5 In this lab, you will learn about the fundamental branching construct, the ifstatement. General Lab Instructions This lab is designed to be completed within the scheduled class meeting time. There are three deliverables fo

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###### lab3-sol
Course: CS 1109
School: Cornell

CS 1109 Summer 2011 Lab 3 Solutions July 5 The if-else-statement if (expression) Statement a1 ; Statement a2 ; . . . else Statement b1 ; Statement b2 ; . . . end To execute the above conditional statement, we begin by evaluating expression. If expression

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###### quiz2-sol
Course: CS 1109
School: Cornell

CS 1109 Summer 2011 Quiz 2 Solutions July 7 Name: NetID: You have 10 minutes to complete this quiz. You may not use a computer to answer the questions. 1. What is an innite loop? [Ans] An innite loop is one that causes a set of instructions or statements

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###### standards
Course: CS 1109
School: Cornell

CS 1109 Code Standards Documentation Script Headers Every script should be prefaced with a header that provides a high-level overview of the problem that it solves. Describe any assumptions that your script requires for correct behavior. For example, if t

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###### loops-review
Course: CS 1109
School: Cornell

Review CS 1109 Summer 2011 July 11 Random Triangles Write a script named triangle.m that generates three random numbers a, b and c between 0 and 1. If a triangle can be formed with those side lengths, your script should print Triangle possible. Otherwise,

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###### lab5-sol
Course: CS 1109
School: Cornell

CS 1109 Summer 2011 Lab 5 Solutions July 12 Introduction to Arrays Creating a Vector The command linspace(a,b,n) produces an array that begins with the number a, ends with the number b, and contains n elements, which are equally spaced from each other and

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###### lab5
Course: CS 1109
School: Cornell

CS 1109 Summer 2011 Lab 5 July 12 In this lab, you will learn about one of the most fundamental data structures in computer science the array. You will learn how to create and manipulate arrays in Matlab. General Lab Instructions This lab is designed to b

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###### lab6-sol
Course: CS 1109
School: Cornell

CS 1109 Summer 2011 Lab 6 Solutions July 14 Practice Using the Colon Operator Useful Functions: zeros and ones 1. To generate a vector of length 10 lled with zeros: zeros(1,10) 2. To generate a 4 6 matrix lled with 10s: 10*ones(4,6) Reversing Arrays To re

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###### lab6
Course: CS 1109
School: Cornell

CS 1109 Summer 2011 Lab 6 July 14 In this lab, you will get a chance to work with the colon notation and matrices (two-dimensional arrays). You will also be introduced to the for-loop construct. General Lab Instructions This lab is designed to be complete

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###### lab7
Course: CS 1109
School: Cornell

Lab 7 CS 1109 Summer 2011 July 19 In this lab, you will develop programs that use single and nested loops. General Lab Instructions This lab is designed to be completed within the scheduled class meeting time. There are three deliverables for this lab a W

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###### quiz3-sol
Course: CS 1109
School: Cornell

CS 1109 Summer 2011 Quiz 3 Solutions July 14 Name: NetID: You have 10 minutes to complete this quiz. You may not use a computer to answer the questions. 1. What is a vector? [Ans] A vector, or a one-dimensional array, is a collection of data organized in

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###### lab8
Course: CS 1109
School: Cornell

Lab 8 CS 1109 Summer 2011 July 21 In this lab, you will learn more about how function calls are executed and practice writing functions of your own. General Lab Instructions This lab is designed to be completed within the scheduled class meeting time. The

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###### lab7-sol
Course: CS 1109
School: Cornell

CS 1109 Summer 2011 Lab 7 Solutions July 19 Nested Loops The outer loop (with index i) runs a total of 20 times. For each run of the outer loop, the inner loop (with index j ) runs 10 times. Thus, in total, the body of the nested loop runs 20 10 = 200 tim

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###### lab9-sol
Course: CS 1109
School: Cornell

CS 1109 Summer 2011 Lab 9 Solutions July 26 Functions Revisited On the surface, there doesnt appear to be much dierent between a script that takes no inputs and produces no outputs, and a function that takes no inputs and produces no outputs. However, rec

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###### quiz4-sol
Course: CS 1109
School: Cornell

CS 1109 Summer 2011 Quiz 4 Solutions July 21 Name: NetID: You have 10 minutes to complete this quiz. You may not use a computer to answer the questions. 1. What is a nested loop? [Ans] A nested loop is a structure where one or more loops are placed inside

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###### lab9
Course: CS 1109
School: Cornell

Lab 9 CS 1109 Summer 2011 July 26 In this lab, you will gain an appreciation for Matlabs usefulness as a data visualization tool. You will also learn how to plot 2-D curves and format gures. General Lab Instructions This lab is designed to be completed wi

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###### lab10
Course: CS 1109
School: Cornell

CS 1109 Summer 2011 Lab 10 July 28 In this lab, you will learn the basics of image processing in Matlab and implement a couple of simple ltering routines. General Lab Instructions This lab is designed to be completed within the scheduled class meeting tim

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###### lab10-sol
Course: CS 1109
School: Cornell

CS 1109 Summer 2011 Lab 10 Solutions July 28 Negative of an Image Comparing the Two Approaches The exact speed-up factor depends on the specic computer you run your code on, as well as whether you included the time taken to render the image negative (i.e.