Lab 4 - Haonan Yu - MAT 275 - Copy.pdf

Lab 4 - Haonan - MAT Yu 275

Table Contents of

MAT 275 MATLAB LAB 4 NAME: Haonan Yu ..................................................................... 1

LAB DAY and TIME:F 1:30 - 2:20 PM PM ........................................................................... 1

Instructor:Salinas ................................................................................................................. 1

Exercise 1 .......................................................................................................................... 1

Exercise 2 6 ..........................................................................................................................

Exercise 3 .......................................................................................................................... 11

Exercise 4 1 3 ..........................................................................................................................

function LAB04ex1

t0=0; tf=50; y0=[-.5;.5];

[t,Y]=ode45(@f,[t0,tf],y0,[]);

y=Y(:,1); v=Y(:,2); % y in output has 2 columns corresponding

figure (1);

plot(t,y, ,t,v,'b' 'r');

legend( ,'y(t)' 'v(t)=y''(t)');

ylim([-1.2,1.2]) grid on

figure (2)

plot(y,v); axis ; xlabel( ); ylabel(square 'y' 'v'); % phase plot