Update app.py

app.py

@@ -380,6 +380,15 @@ with tab4:
         st.subheader("Decoded String (continuous across rows)")
         st.write(decoded_string)
 
+def get_well_position(sample_index):
+    """
+    Convert sample index (1-based) into well position (e.g., A1, A2, ..., B1, B2, ..., etc.)
+    """
+    row_letter = chr(65 + (sample_index - 1) // 12)  # 65 = 'A'
+    col_number = ((sample_index - 1) % 12) + 1
+    return f"{row_letter}{col_number}"
+
+
 # Tab 5: Binary → String
 with tab5: 
     st.header("Decode Binary Labels to String")
@@ -497,7 +506,7 @@ with tab5:
             for row_idx, sample in df_31_robot.iterrows():
                 if sample[col] == 1:
                     source = source_wells_31[i]
-                    dest = f"A{sample['Sample']}"
+                    dest = get_well_position(int(sample['Sample']))
                     vol = round(sample['volume donors (µl)'], 2)
                     robot_script_31.append({'Source': source, 'Destination': dest, 'Volume': vol})