use pr_auc_samples as default metrics for multilabel

pyhealth/metrics/multilabel.py

@@ -11,7 +11,7 @@ def multilabel_metrics_fn(
  threshold: float = 0.5,
 ) -> Dict[str, float]:
  if metrics is None:
- metrics = ["roc_auc_macro", "pr_auc_macro"]
+ metrics = ["pr_auc_samples"]
 
  y_pred = y_prob.copy()
  y_pred[y_pred >= threshold] = 1