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diff --git a/67/CH2/EX2.59/example259.sce b/67/CH2/EX2.59/example259.sce
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+//Example 2.59
+clc;
+n=-8:1:8;
+for i=1:length(n)
+    if n(i)<0 then
+        x(i)=0;
+        h(i)=0;
+    else
+         x(i)=1;
+         h(i)=2^n(i);
+    end
+end
+y=convol(x,h);
+figure
+a=gca();
+plot2d3(n,h);
+a.x_location='origin';
+a.y_location='origin';
+title('Impulse responce');
+figure
+a=gca();
+plot2d3(n,x);
+a.x_location='origin';
+a.y_location='origin';
+title('Input signal');
+figure
+a=gca();
+n1=-16:1:16
+plot2d3(n1,y);
+a.x_location='origin';
+a.y_location='origin';
+title('Output signal');
+\ No newline at end of file