fix formula

app.py

@@ -5,6 +5,6 @@ from evaluate.utils import launch_gradio_widget
 module = evaluate.load("brian920128/doc_retrieve_metrics")
 
 
-result = module.compute(references=[["e", ""]], predictions=[["e", ]])
+result = module.compute(references=[["e", ""]], predictions=[["e", "", "ccc"]])
 print(result)
 #launch_gradio_widget(module)

doc_retrieve_metrics.py

@@ -136,7 +136,7 @@ class DocRetrieveMetrics(evaluate.Metric):
     def _compute(self, predictions, references):
         recall = calculate_recall(predictions, references)
         precision = calculate_precision(predictions, references)
-        f_score = (1 + beta*beta) * precision * recall / (beta * beta)*(precision + recall)
+        f_score = (1 + beta*beta) * precision * recall / (beta * beta*precision + recall)
         return {
             "f1": float(
                 f_score