fix: init of df in Plotting

pages/1_📈_Plotting.py

@@ -41,7 +41,7 @@ if 'df' in list(st.session_state.keys()):
 else:
     st.caption("Upload your data using the sidebar and select a plot-type to start :sunglasses:")
 
-df_base = st.dataframe(st.session_state.df) if 'df' in list(st.session_state.keys()) else pd.DataFrame()
+df_base = st.session_state.df if 'df' in list(st.session_state.keys()) else pd.DataFrame()
 n = len(df_base)
 if n:
     st.info("Your data has {} samples.")