When the graphs are produced and shown, it can happen that no data are there (e.g., the user never went through the hrs dialog). Now just an empty graph is shown, but it would be nice to have at least an explanatory sentence like: "De grafiek is leeg als je nog geen situaties hebt opgegeven waarin het moeilijk was om niet te roken."
When the graphs are produced and shown, it can happen that no data are there (e.g., the user never went through the hrs dialog). Now just an empty graph is shown, but it would be nice to have at least an explanatory sentence like: "De grafiek is leeg als je nog geen situaties hebt opgegeven waarin het moeilijk was om niet te roken."
see also here