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+//Scilab Code for Example 10.2 of Signals and systems by

+//P.Ramakrishna Rao

+//Cross Correlation

+clear;

+clc;

+x=[4,-2,2,0,4];

+y=[0,3,0,-3,6];

+//computation of cross correlation sequence;

+n1 = max(size(y))-1;

+n2 = max(size(x))-1;

+r = xcorr(x,y,n1);

+n=-4:4;

+a=gca();

+a.x_location="origin";

+a.y_location="origin";

+plot2d3(n,r,-9);

+title('rxy_cross-correlation');