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+//Example 3.14
+clear;
+clc;
+to = 2; //Assume the amount of time shift  =2
+T=10;
+t=0:0.1:T;
+for i=1:length(t)
+    if (t(i)>=0 & t(i)<1) 
+       x1(i) = t(i);
+       x2(i)=0;
+    elseif (t(i)>=1 & t(i)<2) then
+        x1(i)=1;
+        x2(i)=t(i)-1;
+    elseif (t(i)>=2 & t(i)<3) then
+        x1(i)=2;
+        x2(i)=1;
+    elseif (t(i)>=3 & t(i)<4)
+        x1(i)=0;
+        x2(i)=2;
+    else
+        x1(i)=0;
+        x2(i)=0;
+    end
+y1(i) = 2*(x1(i));
+y2(i)=2*x2(i);
+end
+figure(0);
+subplot(2,1,1);
+plot(t,x1);
+xtitle("x1(t)","t","x1(t)");
+subplot(2,1,2);
+plot(t,y1);
+xtitle("y1(t)=2*x1(t)","t","y1(t)");
+figure(1);
+subplot(2,1,1);
+plot(t,x2);
+xtitle("x2(t)","t","x2(t)");
+subplot(2,1,2);
+plot(t,y2);
+xtitle("y2(t)=2*x2(t)=2*x1(t-1)=y1(t-1)","t","y2(t)");
+//First shift the input signal only
+Input_shift = 2*(x1(T-to));
+Output_shift = y1(T-to);
+if(Input_shift == Output_shift)
+  disp('The given system is a Time In-variant system');
+else
+  disp('The given system is a Time Variant system');
+end