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信号与系统_陈后金_第二版_课后答案

信号与系统_陈后金_第二版_课后答案
信号与系统_陈后金_第二版_课后答案

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陈后金信号与系统第二版 第二章matlab

52页例2-13 >> %program2-8 >> t=-3:0.001:3; >> ft=tripuls(2*t,4,0.5); >> ft1=tripuls(2*t,4,0.5); >> subplot(2,1,1) >> plot(t,ft1) >> title('f(2t)') >> ft2=tripuls((2-2*t),4,0.5); >> subplot(2,1,2) >> plot(t,ft2) >> title('f(2-2*t)') 53页例2-14 >> %program2_9 the energy of exponential sequence >> k=0:10; >> A=1;a=-0.6; >> fk=A*a.^k; >> W=sum(abs(fk).^2) W = 1.5625

54页例2-15 function yt = f2_2(t) yt=tripuls(t,4,0.5); %program2_10 differentiation h=0.001;t=-3:h:3; y1=diff(f2_2(t))*1/h; plot(t(1:length(t)-1),y1) title('df(t)/dt') -3-2-10123 -1.2-1 -0.8 -0.6 -0.4 -0.2 0.2 0.4 df(t)/dt

%program2_11 integration t=-3:0.1:3; for x =1:length(t) y2(x)=quad('f2_2',-3,t(x)); end plot(t,y2) title('integral of f(t)')

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