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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');