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+//Scilab Code for Example 3.17 of Signals and systems by

+//P.Ramakrishna Rao

+//CTFS coefficients of a periodic signal 

+//x(wt) = Asin wt, 0<wt<pi

+clear;

+close;

+clc;

+A=3.14;

+T =%pi;

+T1 = T/2;

+t = 0:0.01:T1;

+Wo = 2*%pi/T;

+xt =A*sin(Wo*t);

+//

+for k =0:6

+  C(k+1,:) = exp(-sqrt(-1)*Wo*t.*k);

+  c(k+1) = xt*C(k+1,:)'/length(t);

+  if(abs(c(k+1))<=0.01) 

+    c(k+1)=0;

+  end

+end

+c =c';

+c_conj = real(c(:))-sqrt(-1)*imag(c(:));

+ck = [c_conj($:-1:1)',c(2:$)];

+k = 0:6;

+k = [-k($:-1:1),k(2:$)];

+c = gca();

+c.y_location = "origin";

+c.x_location = "origin";

+//c.data_bounds=[-2,0;2,2];

+plot2d(t,xt,5)

+poly1 = c.children(1).children(1);

+poly1.thickness = 3; 

+title('x(t)')

+xlabel('t')

+figure(1);

+c = gca();

+c.y_location = "origin";

+c.x_location = "origin";

+plot2d3('gnn',k,abs(ck))

+poly1 = c.children(1).children(1);

+poly1.thickness = 3; 

+title('|ck|')

+xlabel('k')