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+//Graphical//
+//Implementation of Eample 2.1.2 in Chapter 2
+//Digital Signal Processing by Proakis, Third Edition, PHI
+//Page 52
+
+
+clear;
+clc;
+close;
+
+x = [0 0 0 -1 0 1 2 3 4 5 5 5 5 5];
+
+x1 =  [0 0 0 x];        //x(n-3)
+
+x2 =[x 0 0];            //x(n+2)
+ 
+
+a=gca();
+a.thickness = 2;
+a.y_location = "middle";
+a.x_location = "middle"
+
+subplot(3,1,1)
+a=gca();
+a.thickness = 2;
+a.y_location = "middle";
+a.x_location = "middle"
+plot2d3('gnn',1:length(x),x) 
+xtitle('Graphical Representation of signal x',' ---> n',' --->x[n]');
+
+subplot(3,1,2)
+a=gca();
+a.thickness = 2;
+a.y_location = "middle";
+a.x_location = "middle"
+plot2d3('gnn',x1)
+xtitle('Graphical Representation of signal delayed version of x',' ---> n',' --->x[n-3]');
+
+subplot(3,1,3)
+a=gca();
+a.thickness = 2;
+a.y_location = "middle";
+a.x_location = "middle"
+plot2d3('gnn',x2)
+xtitle('Graphical Representation of signal advanced version of x',' ---> n',' --->x[n+2]');