initial commit / add all books

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diff --git a/851/CH7/EX7.4/Figure7_4.sce b/851/CH7/EX7.4/Figure7_4.sce
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+//clear//

+//Caption:Signal Space diagram for coherent BFSK

+//Figure7.4 Signal Space Diagram for coherent BFSK system

+clear

+clc;

+close;

+M =2;

+y = [1,0;0,1];

+annot = dec2bin([M-1:-1:0],log2(M));

+disp(y,'coordinates of message points')

+disp(annot,'Message points')

+figure;

+a =gca();

+a.data_bounds = [-2,-2;2,2];

+a.x_location = "origin";

+a.y_location = "origin";

+plot2d(y(1,1),y(1,2),-9)

+plot2d(y(2,1),y(2,2),-5)

+xlabel('                                                                      In-Phase');

+ylabel('                                                                    Quadrature');

+title('Constellation for BFSK')

+legend(['message point 1 (binary 1)';'message point 2 (binary 0)'],5)