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Unformatted text preview: Mech 221: Computer PreLab Assignments To help you succeed in this course, there will be prelab assignments for every computer lab. The goals of the prelabs are to reinforce concepts taught in class that will be used in the labs and to introduce any new MATLAB commands that will be used in the upcoming lab. By doing the prelabs, you will make yourself ready to do the labs in the allotted time. Four out of ten of the marks for a lab are based on the prelab questions. Solutions to prelab assignments should be handed in to the TA at the beginning of each lab. Mech 221: Computer PreLab 1 Hand in the solutions to the two questions in the prelab at the beginning of the lab. PreLab Learning Objectives : After completing this prelab assignment, you should be able to: recognize the correct syntax of and describe the output of some MAT LAB commands used to create and access parts of a vector, to perform numerical integration, and to create plots; determine an adequate number of points to get sufficient accuracy from a numerical integration method; interpret, modify, and write MATLAB code to implement algorithms for numerical integration. Point of Clarification : As discussed in the lecture notes, when a problem needs to be solved using N intervals, this is done with N + 1 function values at evenly spaced points at the ends of these intervals. 1 MATLAB commands to know for the lab Commands to create a vector: linspace(a,b,N) This command will generate a linearly spaced vector with N evenly spaced components, or points, between the values a and b , inclusive. For example, >> x = linspace(0,2,5) will create the row vector: x = 0.5000 1.0000 1.5000 2.0000 As mentioned in the Point of Clarification above, these 5 points corre spond to 4 subintervals of equal length within the interval [0, 2]. a:b This command will generate a row vector of values from a to b , inclu sive, with distance between successive points equal to 1. For example, >> x = 1:4 will create the row vector with entries 1 2 3 4 . a:dx:b This command will generate a vector of values from a to b , inclusive, with distance between successive points dx . For example, >> x = 0:0.25:1 will create the row vector: x = 0.2500 0.5000 0.7500 1.0000 This command is useful if you want to create a vector of values with a...
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This note was uploaded on 10/26/2010 for the course ENGINEERIN MECH221 taught by Professor Wetton during the Spring '10 term at The University of British Columbia.
 Spring '10
 WETTON

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