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+//Example 1.25(d)

+//To check whether the given discrete system is a Linear System (or) Non-Linear System y[n])= 2*x[n]-3

+clear;

+clc;

+x1=[1,1,1,1];

+x2=[2,2,2,2];

+a=1;

+b=1;

+for n=1:length(x1)

+x3(n)=a*x1(n)+b*x2(n);

+end

+for n=1:length(x1)

+y1(n)=2*x1(n)-3;

+y2(n)=2*x2(n)-3;

+y3(n)=2*x3(n)-3;

+end

+for n=1:length(y1)

+z(n)=a*y1(n)+b*y2(n);

+end

+count=0;

+for n=1:length(y1)

+if(y3(n)==z(n))

+count=count+1;

+end

+end

+if(count==length(y3))

+disp('Since It satisifies the superposition principle')

+disp('The given system is a Linear system')

+else

+disp('Since It does not satisify the superposition principle')

+disp('The given system is a Non-Linear system')

+end