55 lines
755 B
Matlab
55 lines
755 B
Matlab
figure(1);
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syms x;
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t=-5:0.0001:5;
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fx=heaviside(x+2)-heaviside(x-2);
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ezplot(fx,[-5,5]);
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figure(2);
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fy=heaviside(x+0.2)-heaviside(x-0.2);
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ezplot(fy,[-5,5]);
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figure(3);
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fz=heaviside(x+0.1)-heaviside(x-0.1);
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ezplot(fz,[-5,5]);
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figure(4);
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subplot(2,1,1);
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fa=5*cos(12*pi*t)+6*cos(18*pi*t);
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plot(t,fa);
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subplot(2,1,2);
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xcorr1=autocorr(fa,t);
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plot(corr1);
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figure(5);
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fb=(cos(2*pi*t)).*(cos(2*pi*t));
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plot(t,fb);
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figure(6);
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t = 0:0.1:10;
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b1=[1,5,6];
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a1=[1,5];
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sys=tf(a1,b1);
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y1=step(sys,t);
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a2=[1,5];
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b2=[1,2,5];
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sys=tf(a2,b2);
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y2=step(sys,t);
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a3=[1.5];
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b3=[1,2,1];
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sys=tf(a3,b3);
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y3=step(sys,t);
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plot(t,y1,t,y2,'--',t,y3,'+');
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figure(7);
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sys=tf([1,2],[1,3,2]);
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y=impulse(sys,t);
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plot(t,y);
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f=cos(t);
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sys=tf([-1,2],[1,3,2]);
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y=lsim(sys,f,t);
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plot(t,f);
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