Update app.py

app.py

@@ -67,7 +67,15 @@ def generate_forecast(model, df,tag=False):
 def determine_frequency(df):
     df['ds'] = pd.to_datetime(df['ds'])
     df = df.set_index('ds')
-    freq = pd.infer_freq(df.index)
+    
+    # Create a complete date range
+    full_range = pd.date_range(start=df.index.min(), end=df.index.max())
+    
+    # Reindex the DataFrame to this full date range
+    df_full = df.reindex(full_range)
+    
+    # Infer the frequency
+    freq = pd.infer_freq(df_full.index)
     return freq
 
 def plot_forecasts(forecast_df, train_df, title):