Hi,
I think you are confusing two different terms: whether a state is a parent/substate and what type of active state output it is producing.
- A state is a parent state or a substate based on its geometric location in the chart. For more information, see https://www.mathworks.com/help/stateflow/api/creating-and-destroying-api-objects.html
- States can output self-activity, child activity, and leaf activity, as described in https://www.mathworks.com/help/stateflow/ug/about-active-state-data.html.
In your chart, state A is outputing information about which substate (A1 or A2) is active. States A1 and B are outputing information about whether they are active or not. This makes sense becasue A has substates to monitor, while A1 and B do not.
Now, if you want to check whether a state is a perent or not, you can try to count the number of substates it contains by entering:
>> numel(find(state,"-isa","Stateflow.State"))
PS. If you are running an older version of MATLAB, try using single quotes instead of double quotes.
