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+//Example 2_3
+//Find the convolution of two continuous time signal
+clc;
+t=-8:1/100:8;
+for i=1:length (t)
+x(i)=exp(-abs(t(i)));
+if t(i)>=1 then
+h(i)=exp(-2*t(i));
+else
+h(i)=0;
+end
+end
+t1=t;
+y= convol (x,h)
+figure
+plot2d(t1,h);
+title('Impul seresponce');
+figure
+plot2d(t,x);
+title('Input signal');
+figure
+t2=-16:1/100:16
+plot2d(t2,y);
+title('Output signal');