diff options
Diffstat (limited to 'src/Bottleneck_distance/include/gudhi/Bottleneck.h')
| -rw-r--r-- | src/Bottleneck_distance/include/gudhi/Bottleneck.h | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/src/Bottleneck_distance/include/gudhi/Bottleneck.h b/src/Bottleneck_distance/include/gudhi/Bottleneck.h index e466828a..c916898d 100644 --- a/src/Bottleneck_distance/include/gudhi/Bottleneck.h +++ b/src/Bottleneck_distance/include/gudhi/Bottleneck.h @@ -35,8 +35,12 @@ namespace persistence_diagram { inline double bottleneck_distance_approx(Persistence_graph& g, double e) { double b_lower_bound = 0.; - double b_upper_bound = g.diameter_bound(); - const double alpha = std::pow(g.size(), 1. / 5.); + double b_upper_bound = g.max_dist_to_diagonal(); + int siz = g.size(); + if (siz <= 1) + // The value of alpha would be wrong in this case + return b_upper_bound; + const double alpha = std::pow(siz, 1. / 5.); Graph_matching m(g); Graph_matching biggest_unperfect(g); while (b_upper_bound - b_lower_bound > 2 * e) { |