1. Introduction to Programming in MATLAB Intro. MATLAB Peer Instruction Lecture Slides by Dr. Cynthia Lee, UCSD is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. Based on a work at www.peerinstruction4cs.org.Dr. Cynthia Lee, UCSDCreative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported Licensewww.peerinstruction4cs.org 1

2. SWITCH-CASE 2

3. Switch-Case Programming Goal: we want to write a function that converts month numbers to the corresponding month names – MonthName(12) returns ‘December’ – MonthName(3) returns ‘March’ – Etc. Input argument is the number, we will return a string of the name. 3

4. function [name] = MonthName(number) _________________ 4 We start by writing the Function Definition Line, which has been done for you. What should go on the blank line to begin the body of our function? a)case name b)switch name c)case number d)switch number e)Other/error function [outputs]=function name(arguments) FUNCTION DEFINITION LINE:

5. function [name] = MonthName(number) _________________ 5 What should go on the blank line to continue our code? a)case 1 b)case name c)case ‘January’ d)case number e)Other/error

6. function [name] = MonthName(number) _________________ 6 What should go on the blank line to continue our code? a)display(‘January’) b)display(‘1’) c)name = ‘January’ d)number = 1 e)Other/error

7. function [name] = MonthName(number) switch number case 1 name = ‘January’; case 2 name = ‘February’; case 3 name = ‘March’; …several more cases here!… case 12 name = ‘December’; otherwise name = ‘’; end 7

8. BACK TO WHILE LOOPS while loops while loops while loops while loops while loops 8

9. How many times does this loop print “hi”? a)0 b)6 c)7 d)8 e)Other 9 i=1; while i<=7 display(‘hi’) end

10. How many of these print ‘hi’ seven times? for i = 0:7 display('hi') end for i = 1:7 display('hi') end a)0 b)1 c)2 d)3 e)4 10 i=1; while i<=7 display(‘hi’) i = i + 1; end i=0; while i<7 display(‘hi’) i = i + 1; end Can you write another loop, different from all these, that prints ‘hi’ seven times?