Update app.py

app.py

@@ -40,20 +40,32 @@ def format_ragas_results(ragas_results):
     ]
 
 def plot_radar_chart(ragas_results):
-    scores_dict = ragas_results.scores[0]
+    # Extract first sample if multiple scores
+    if isinstance(ragas_results.scores, list):
+        scores_dict = ragas_results.scores[0]  # first sample
+    else:
+        scores_dict = ragas_results.scores
+
     labels = list(scores_dict.keys())
     values = list(scores_dict.values())
-    values.append(values[0])  # Close the loop
-    labels.append(labels[0])
-
-    fig, ax = plt.subplots(figsize=(6, 6), subplot_kw=dict(polar=True))
-    angles = [n / float(len(labels)) * 2 * 3.14159 for n in range(len(labels))]
-    ax.plot(angles, values, 'b-', linewidth=2)
-    ax.fill(angles, values, 'skyblue', alpha=0.4)
-    ax.set_yticklabels([])
-    ax.set_xticks(angles)
-    ax.set_xticklabels(labels, fontsize=9)
-    ax.set_title("RAGAS Evaluation Radar Chart", size=14)
+
+    # Close the loop for radar chart
+    values += values[:1]
+    angles = np.linspace(0, 2 * np.pi, len(labels), endpoint=False).tolist()
+    angles += angles[:1]
+
+    fig, ax = plt.subplots(figsize=(6,6), subplot_kw=dict(polar=True))
+
+    ax.fill(angles, values, color='skyblue', alpha=0.4)
+    ax.plot(angles, values, color='blue', linewidth=2)
+
+    ax.set_yticks([0.2, 0.4, 0.6, 0.8, 1.0])
+    ax.set_yticklabels(['0.2', '0.4', '0.6', '0.8', '1.0'])
+
+    ax.set_xticks(angles[:-1])
+    ax.set_xticklabels(labels)
+
+    ax.set_title('RAGAS Metrics Radar Chart', size=14, y=1.05)
 
     chart_path = "radar_chart.png"
     fig.savefig(chart_path)