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diff --git a/2048/DEPENDENCIES/pacf.sci b/2048/DEPENDENCIES/pacf.sci
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+++ b/2048/DEPENDENCIES/pacf.sci
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+// Determination of the PACF of AR(p) process, as explained in Sec. 6.4.5.
+// 6.10
+
+function [ajj] = pacf(v,M)
+exec('label.sci',-1);
+rvvn = xcorr(v,'coeff'); 
+len = length(rvvn);
+zero = (len+1)/2;
+rvvn0 = rvvn(zero);
+rvvn_one_side = rvvn(zero+1:len);
+ajj = [];
+exec('pacf_mat.sci',-1);
+for j = 1:M,
+  ajj = [ajj pacf_mat(rvvn0,rvvn_one_side,j,1)];
+end
+p = 1:length(ajj);
+N = length(p);
+lim = 2/sqrt(length(v));
+
+// Plot the figure
+plot(p,ajj,p,ajj,'o',p,lim*ones(N,1),'--',...
+               p,-lim*ones(N,1),'--');
+label('',4,'Lag','PACF',4);
+endfunction;