Figure 4: Sensitivity and specificity are plotted versus , the number of variables selected for conditioning, for two values of the number of samples , 500 (left) and 1000 (right). The order is , similar results are obtained varying . The results are averaged over 100 realizations of the linear dynamical system described in the text. The empty square, in correspondence to , is the result from the bivariate analysis. The horizontal line is the outcome from multivariate analysis, where all variables are used for conditioning.