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The Very Basics Variables, Vectors, and Matrices Loops and Functions Plotting and Graphics EE 20: Linear Methods for Engineering Analysis and Design Using MATLAB Lecture 1 Introduction to MATLAB The Very Basics Variables, Vectors, and Matrices Loops and Functions Plotting and Graphics Command Prompt Enter commands at the prompt Example: 2 + 3 ans = 5 Another example: pi ans = 3.1416 The Very Basics Variables, Vectors, and Matrices Loops and Functions Plotting and Graphics M Files You can prepare files consisting of MATLAB commands to be executed in order. They need to have a “ .m” extension. For example, let the contents of file test.m be disp(’Hello world!’) 2 + 5*cos(pi/6)ˆ2 - 3*sin(pi/8) disp(’Goodbye world...’) At the command prompt: test Hello world! ans = 4.6019 Goodbye world... The Very Basics Variables, Vectors, and Matrices Loops and Functions Plotting and Graphics Short and Long Formats The format command changes the display mode. format long pi ans = 3.141592653589793 format short pi ans = 3.1416 The default format is short The Very Basics Variables, Vectors, and Matrices Loops and Functions Plotting and Graphics How To Get Help The help command followed by another command name: help format FORMAT Set output format. FORMAT with no inputs sets the output format to the default appropriate for the class of