matlab.rar_Different_Matlab Plot

clear all ; t=-100:01:100; fm=0.02; x=cos(2*pi*t*fm); subplot(2,2,1); plot(t,x); xlabel('time in sec'); ylabel('x(t)'); title('continuous time signal'); fs1=0.02; n=-2:2; x1=cos(2*pi*fm*n/fs1); subplot(2,2,2); stem(n,x1); hold on subplot(2,2,2); plot(n,x1,':'); title('discrete time signal x(n) with fs<2fm'); xlabel('n'); ylabel('x(n)'); fs2=0.04; n1=-4:4; x2=cos(2*pi*fm*n1/fs2); subplot(2,2,3); stem(n1,x2); hold on subplot(2,2,3); plot(n1,x2,':'); title('discrete time signal x(n) with fs>2fm'); xlabel('n'); ylabel('x(n)'); n2=-50:50; fs3=0.5; x3=cos(2*pi*fm*n2/fs3); subplot(2,2,4); stem(n2,x3); hold on subplot(2,2,4); plot(n2,x3,':'); xlabel('n'); ylabel('x(n)'); title('discrete time signal x(n) with fs=2fm');