A bottleneck distance matrix.

This matrix was obtained from a simulation with mean firing rate 20 Hz, place field size 16 cm, and τ = 2000. Since the experiment duration is 5000, the maximum bar length in a barcode is ≤ 5000. The bottleneck distance between barcodes with a different number of long bars is approximately 5000 × 1/2 = 2500 (shown in yellow).