Figure 4.

The average correlation vs. frequency for connections whose strength lies in the range (A) 〈W〉 = 0.15 and (B) 〈W〉 = 0.25 and various distances indicated in the legends. The average correlation vs. frequency for connections whose distance lies in the range (C) 〈d〉 = 25 mm and (D) 〈d〉 = 35 mm and various strengths indicated in the legends. Correlation is calculated using the correlation index σ_ij defined in Methods. The colored areas show the results for p-value = 0.05. The width of the bins was set to 0.05 for the connection strengths and 16 mm for distances.