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+//Scilab Code for Example 7.9 of Signals and systems by

+//P.Ramakrishna Rao

+clc;

+clear x y1 y y2 q t n;

+clear;

+//y(t)=exp|x(n)|

+x1=[1,3,5,3];//random variable

+x2=[2,4,6,4];

+for n=1:4

+    y1(1,n)=exp(abs(x1(n)));

+    y2(1,n)=exp(abs(x2(n)));

+end

+b1=2;

+b2=3;

+x=b1*x1+b2*x2;

+disp(x,'The input to the system is:');

+for n=1:4

+    q(1,n)=exp(abs(b1*(x1(n))+b2*(x2(n))));

+end

+disp(q,'This input gives the output:');

+y=b1*y1+b2*y2;

+disp(y,'For the system to be linear the output should be:');

+disp('(ii)    Hence the system is not linear');

+disp('For a delay (n0) of 2 seconds');

+disp('At n=3 seconds:');

+n=4;

+a=exp(abs(x1(n-2)));

+b=y1(1,n-2);

+disp(a,'e^x(n-n0):');

+disp(b,'is equal to y(n-n0):');

+disp('(iii)    Hence the system is Time invariant');