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+//Scilab Code for Example 5.11 of Signals and systems by

+//P.Ramakrishna Rao

+clear;

+clc;

+wc=1;

+y=1;

+for n=-%pi:%pi/80:%pi

+    if n<-wc | n>wc then

+        X(1,y)=1;

+        y=y+1;

+    else X(1,y)=0;

+        y=y+1;

+    end

+end

+n=-%pi:%pi/80:%pi;

+a = gca ();

+a.y_location ="origin";

+a.x_location ="origin";

+plot(n,X);

+xlabel ( 'Frequency in Radians/Seconds' );

+title ('X(e^jw))    at    Wc=1');

+A=1/%pi;

+for k=-10:10

+    x(k+11)=A*integrate('cos(w*k)','w',wc,%pi);

+end

+figure(1);

+k=-10:10;

+a = gca ();

+a.y_location ="origin";

+a.x_location ="origin";

+plot2d3(k,x);

+xlabel ( 'Time in Seconds' );

+title ('x(n)    at    Wc=1');