Benchmark plots. Benchmark plots: comparison of (a) sensitivity (b) search complexity and (c) efficiency in various noise levels. Values are averaged over five replications. Five order-preserving patterns of ℜ|10|×|10| are embedded to a random matrix of ℜ|50|×|50| . The search parameters are set to u = 10, l = 10 for both SPM-window and SPM-naive, and w
= 20, w
= 1, 2, 3 for SPM-window.