//Scilab Code for Example 7.1 of Signals and systems by

//P.Ramakrishna Rao

clc;

clear;

a0=2;

a1=2;

a2=4;

x1=[1,3,5,7];

x2=[2,4,6,8];

for t=1:4

y1(1,t)=a0+a1*x1(t)+a2*(x1(t))^2;

y2(1,t)=a0+a1*x2(t)+a2*(x2(t))^2;

end

b1=2;

b2=3;

x=b1*x1+b2*x2;

disp('y(n) does not depend on past inputs');

disp('Hence the system is Static');

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

for t=1:4

q(1,t)=a0+a1*x(t)+a2*(x(t))^2;

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('Hence the system is not linear');