refactor: fill na values as 0 (#131)

Co-authored-by: anna-grim <[email protected]>

Author: anna-grim

src/segmentation_skeleton_metrics/skeleton_metric.py

@@ -419,6 +419,7 @@ def run(self):
         # Save results
         prefix = "corrected-" if self.connections_path else ""
         path = f"{self.output_dir}/{prefix}results.csv"
+        self.metrics.fillna(0)
         self.metrics.to_csv(path, index=True)
 
         # Report results