dbscan(): only create clusters with non-empty core

fixes #200
JuliaStats · Mar 22, 2023 · 6076f16 · 6076f16
1 parent 47d417f
commit 6076f16
Showing 1 changed file with 4 additions and 2 deletions.
diff --git a/src/dbscan.jl b/src/dbscan.jl
@@ -214,8 +214,10 @@ function _dbscan(kdtree::KDTree, points::AbstractMatrix, radius::Real;
             core_selection[current_index] = true
             update_exploration_list!(adj_list, to_explore, visited)
         end
-        cluster_size = sum(cluster_selection)
-        min_cluster_size <= cluster_size && accept_cluster!(clusters, core_selection, cluster_selection, cluster_size)
+        if any(core_selection) &&
+           (cluster_size = sum(cluster_selection)) >= min_cluster_size
+            accept_cluster!(clusters, core_selection, cluster_selection, cluster_size)
+        end
     end
     return clusters
 end