when something is changed in a table, e.g. the data type of a column, the graphs created before the change don't take it into account. Is there any way to have them updated with the latest changes to the table?
Under the red triangle you can find script/automatic recalc and "redo analysis". In automatic recalc mode all stastistics is recalculated if you change data, e.g. exclude rows. However, I am not sure that changing data type is acknowledged by Automatic recalc. Then "redo analysis" is to prefer.
You can also save scripts to data table if you want quick access to often used graphs.