Getting_Started_with_MATLAB - MATLAB Project Getting...

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MATLAB Project: Getting Started with MATLAB Name________________________________ Purpose: To learn to create matrices and use various MATLAB commands. Examples here can be useful for reference later. MATLAB functions used : []:;+-*^ size , help , format , eye , zeros , ones , diag , rand , round , cos , sin , plot , axis , grid , hold , path ;a n d randomint and startdat from Laydata Toolbox Introduction. This can be used as a brief tutorial and as a reference for basic operations. Use MATLAB's help command or see a User’s Guide for more information. Some of the commands discussed here are about linear algebra topics which will not be formally introduced in your course for several weeks, so even if you go through this project early, you may want to refer back to it at various times. Write notes and questions to yourself as you work through it. Instructions. Start MATLAB by clicking on its icon (or if you have MATLAB 3.5, type matlab at the DOS prompt). The MATLAB prompt is a double arrow, >> . In this project each line that begins with >> is a command line, and the bold face words following >> are MATLAB commands. Try each of these for yourself: that is, type the bold face words and then press the key that is labeled "Return" or "Enter," to cause those commands to be executed. (In the first few sections we will write [Enter] to mean press that key, but we will omit this "carriage return" prompt later.) After you execute each line, study the result to be sure it is what you expect, and take notes. After trying the examples in each section, do the exercises. If you do not complete this tutorial in one session, the variables you created will be erased when you exit MATLAB. See the remark before Section 6 to find out how to get them back quickly the next time you continue work on this project. Sections: 1. Creating matrices, page 1 2. The arrow keys, page 2 3. The size command, page 3 4. The help command, page 3 5. Accessing particular matrix entries, page 3 6. Pasting blocks together, page 4 7. Some special MATLAB functions for creating matrices: eye , zeros , ones , diag ,page4 8. Using the colon to create vectors with evenly spaced entries, page 5 9. Using the semicolon to suppress printing, page 5 10. The format command, page 5 11. Matrix arithmetic, page 6 12. Creating matrices with random entries, page 7 13. Plotting, page 8 14. Creating your own M-files, page 10 15. Ways to get Laydata Toolbox and ATLAST M-files, page 10 16. Installing M-files into the MATLAB path, page 10 1. Creating matrices. A matrix is a rectangular array, and in linear algebra the entries will usually be numbers. The most direct way to create a matrix is to type the numbers between square brackets, using a space or comma to separate different entries and a semicolon or [Enter] to create row breaks. Examples: >> A = [1 2;3 4;5 -6] [Enter] A= 12 34 5-6 >> B = [1 -2 3 [Enter] 45-6] [Enter] B= 1- 23 45 - 6 >> x = [4;3;2]
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Page 2 of 11 MATLAB Project: Getting Started with MATLAB
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This note was uploaded on 09/16/2009 for the course MATH 220 taught by Professor Lewis during the Fall '08 term at Washington State University .

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Getting_Started_with_MATLAB - MATLAB Project Getting...

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