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Table 1 Spearman’s rank correlation coefficient between the length of a protein (L) and evaluation measures for PSICOV predicted long-range contacts in the PSICOV data set. It shows that spread, coverage and Xd are more correlated to L and Nc than precision and mean false positive error, especially below top-L contact selection. For this dataset, the lengths are distributed in the range [50, 266] with mean and standard deviation of 145 and 52 respectively

From: ConEVA: a toolbox for comprehensive assessment of protein contacts

Contact-Selection Top-5 Top-L/10 Top-L/5 Top-L/2 Top-L Top-2 L
L vs Precision −0.01 −0.07 0.06 0.24 0.26 0.27
L vs Coverage −0.88 −0.59 −0.51 −0.34 −0.30 −0.31
L vs Xd 0.31 0.35 0.46 0.49 0.51 0.55
L vs FP-Error −0.05 0.04 −0.06 −0.16 −0.01 0.21
L vs Spread 0.88 0.66 0.60 0.58 0.55 0.57