?? convert_to_lagged_form.m
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function yy = convert_to_lagged_form(y, k)% Create an observation vector yy(:,t) containing the last k values of y, newest first% e.g., k=2, y = (a1 a2 a3) yy = a2 a3% (b1 b2 b3) b2 b2% a1 a2% b1 b2[s T] = size(y);bs = s*ones(1,k);yy = zeros(k*s, T-k+1);for i=1:k yy(block(i,bs), :) = y(:, k-i+1:end-i+1);end
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