1、东华大学信号与系统作业答案w=pi;A=2;t=-10:0.05:10;y=A*exp(w.*t);plot(t,y)w=pi;A=2;o=2/pi;t=-10:0.05:10;y=A*cos(w*t+o);plot(t,y);title(y=Acos(wt+o);xlabel(t);axis(-10,10,-3,3);grid onclear;w=pi;A=2;o=2/pi;t=-10:0.05:10;y=A*sin(w*t+o);plot(t,y);title(y=Asin(wt+o);xlabel(t);axis(-10,10,-3,3);grid onclear;syms t;f=si
2、nc(t);ezplot(f,-10 10);xlabel(t);grid ont=-10:0.05:10;f=rectpuls(t, 4);plot(t,f)plot(t,f);axis(-10,10,-5,5);title(rectpuls(t,4);xlabel(t);grid ont=-10:0.05:10;f=tripuls(t,4,0.5);plot(t,f);axis(-10,10,-5,5);title(tripuls(t,4,0.5);xlabel(t);grid ont=-5:0.05:15;f=rectpuls(t-6,12)+tripuls(t-6,4,0);plot(
3、t,f);title(f(-t);xlabel(t);grid ont=-20:0.05:20;f=rectpuls(t-8,12)+tripuls(t-8,4,0);plot(t,f);title(f(t-2);xlabel(t);grid ont=-20:0.05:20;f=rectpuls(1-2*t-6,12)+tripuls(1-2*t-6,4,0);plot(t,f);title(f(1-2t);xlabel(t);grid ont=-20:0.05:25;f=rectpuls(0.5*t+1-6,12)+tripuls(0.5*t+1-6,4,0);plot(t,f);xlabel(t);title(f(0.5t+1);grid on