- When do you want to save what? After the figure is closed, it is closed and the contents is gone. Of course you have to save any content before it is closed, e.g. by using e "Save" button or automatically inside the CloseRequestFcn or DeleteFcn. Simply save the output of get(TableH, 'Data'), with the uitable handle in "TabelH".
- How can the first column by a sum of the last column?
- Yes, of course there is a way: Simply add a button. Either do this manually or using GUIDE, exactly as you have created the table.