% Program 10_1% Illustration of Up-Sampling by an Integer Factor%clf;n = 0:50;x = sin(2*pi*0.12*n);y = zeros(1, 3*length(x));y([1: 3: length(y)]) = x;subplot(2,1,1)stem(n,x);title('Input Sequence');xlabel('Time index n');ylabel('Amplitude');subplot(2,1,2)stem(n,y(1:length(x)));title('Output Sequence');xlabel('Time index n');ylabel('Amplitude');