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+//Page Number: 11.33

+//Example 11.34

+clc;

+//Given

+//(a) For Shannon Fano Code

+Px=[0.4 0.19 0.16 0.15 0.1];

+n=[2 2 2 3 3];

+

+//Average Code length

+//L=Summation(P(xi)ni) 

+L=0;

+for i=1:5

+    L=L+(Px(i)*n(i));

+end

+

+//As H(X)=-Sum of[P(xi)log2P(xi)] 

+//Where i=0 to n;

+HofX=0;

+for i=1:5

+    HofX=HofX+(Px(i)*log2(Px(i)));

+end

+

+//Efficiency=H(X)/L

+n=-HofX/L;

+np=n*100;

+disp('%',np,'Code efficiency for shannon fanon:');

+

+//(b) For Huffman Code

+nh=[1 3 3 3 3];

+

+//Average Code length

+//L=Summation(P(xi)ni) 

+Lh=0;

+for i=1:5

+    Lh=Lh+(Px(i)*nh(i));

+end

+

+//Efficiency=H(X)/L

+n1=-HofX/Lh;

+np1=n1*100;

+disp('%',np1,'Code efficiency for hauffman:');