Matlab Expressions and Calculations in Civil Engineering, Quizzes of Engineering

Download Matlab Expressions and Calculations in Civil Engineering and more Quizzes Engineering in PDF only on Docsity! ENGR 1202 – Introduction to Civil Engineering Quiz 1 Fall 2002 September 16, 2002 jdb_635.doc Test Format and Instructions • 5 problem on 1 page, 100 points total, 20 points each problem • open book and notes, show all calculations for partial credit 1. Write a Matlab expression that sets the variable “a_1” equal to a row vector, where each element of the row vector is one of the solutions to the equation x3 + x + 3 = 0. 2. Write a Matlab expression to create the variable “xx” which is set equal to the matrix shown below. | 3 5 2 | | 4 6 9 | | 12 3 5 | 3. Now, once you’ve set “xx” equal to the matrix shown above, what would be the numerical value of “y” once you’ve executed the following Matlab expression? y = mean (xx(3 , :)) y = ________________ The following Matlab expressions have been executed x = 1 : 10 y = length(x) z = max (x + 10) z1 = sin (min(x) – 1) 4. What is the numerical value of y? y = ______________ 5. What are the numerical values of z and z1? z = __________ z1 = _______________