function pushbutton2_CallbackhObject eventdata handles hObject handle to pushbutton2 see GCBO eventdata reserved - to be defined in a future version of MATLAB handles structure with handles and

This function loads a text file or an Excel file selected by the user and checks if it contains two columns of data. If not, it tries to import the data as two columns. If the file is not a text or an Excel file, it displays an error message. It also checks if the data is negatively correlated and displays a warning message if it is. Finally, it updates the handles structure. There are no obvious errors in the function.