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G- Computer Questions- Solutions and RubricExam 1

# G- Computer Questions- Solutions and RubricExam 1 -...

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Computer Question 1: Subplot Write Matlab code that does the following: 1) Begins by setting A = [ 1:10 ; 31:40 ; 26:2:44 ]; 2) Then, your program should calculate the sum of each row of A . If, and only if, the sum of any of the rows of the matrix A is at least 350, your program should display the following two graphs next to each other using subplot, with x containing 243 points running from 1 to 20.: y = x 3 + 2x y = x 4 - 10000 sin(x) Your graph should look like this: s = sum(A'); if (sum(s>=350)) % another possibility: if(max(s)>=350) x = linspace(1,20,243); subplot(1,2,1);plot(x,x.^3 + 2*x); subplot(1,2,2);plot(x,x.^4-10000*sin(x)); end -4 if they have minor syntax errors (they had the computer to check answers) -6 if they don’t have the if statement’s condition correct, but successfully use subplot, plot, and linspace -8 if they at least successfully use 2 of the following: subplot, plot, and linspace -10 if they at least successfully use 1 of the following: subplot, plot, and linspace -12 if they seem to kind of understand how to plot things -14 otherwise Computer Question 2: Class Grades Run the following commands, which create a 100 element row vector b : rand( 'state' , 4 ) ; b = round( 100*rand(1,100) - 10 ); class = ‘Matlab’;

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