MATLAB: Modify Transition condition of Stateflow with script

Question

Hello Everyone, Is it possible to modify a transition condition of Stateflow with m-file script? maybe someting similar to set_param? Thanks a lot

Answer 1

There is a way to modify a transition condition in Stateflow.

To do that, you will need to use the Stateflow API. You can find a quick start guide in the following documentation link:

https://www.mathworks.com/help/stateflow/api/quick-start-for-the-stateflow-api.html

When you reach step 6 of this example, you will notice that you can modify the LabelString property of the transition. There you can set it equal to a condition. For example:

trans1_2.LabelString = '[u>0]'

assuming that trans1_2 is the transition handle.

Given that, you first need to find that handle. In the following documentation page:

https://www.mathworks.com/help/stateflow/api/accessing-existing-stateflow-objects.html

you can find information on how to access Stateflow Objects programmatically. Specifically, the following command:

transArray = sA.find('-isa','Stateflow.Transition');

returns an array of all the transitions. Using that, you can find the handle you are looking for, and then modify the LabelString property to your needs.