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# r1_yun - Recitation 1 Purpose a Learn how to use MATLAB...

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Recitation 1 Purpose a) Learn how to use MATLAB desktop and its various windows (command, workspace, etc.) b) Learn how to get help (helpdesk, doc, etc.) Problems (Note, remember to get help from Matlab, when you meet difficulties.) 1. Use Matlab to calculate the following problems. a) (5^2)/(48-33) b) 3 7 5 2 + 2. Create a bunch of variables (some with decimals, some with character arrays). a = ‘hello’; A = 27; % Variable names are case sensitive, so variable A is different from a. b = ‘m’; x = 15; x = x + 1; % Now, what is the value of x? y = 22.45; d = x + y; variable1 = 2 + 3i; % complex number variable2 = 2 + 3 * y; % Notice the difference circumference = 2 * pi * r; % Figure out why this does not work. whos; % What does the whos command tell you? clear d; % Delete variable d. 3. row vector & column vector & cell array a = 1 : 5; % colon operator, also try 1 : 1 : 5 % How do you create the same vector a by using linspace ? (Remember to get help from Matlab.) b = 1 : 0.2 : 5; % row vector What is the value of the 17 th element of vector b?

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