MATLAB: Delete specific outgoing RMI links programatically

linkRequirementsrmisimulinkSimulink Requirements

I would like to remove a single requirement link from my Simulink object.

I have found that i can clear ALL links using the following command:

>> rmi('clear all',object)

https://www.mathworks.com/help/slrequirements/ref/rmi.html

But i don't want to delete all of them, just a specific requirement. How can I do that?

Best Answer

In order to remove one or more requirement links from an object, you will need to copy the current requirement links, remove those that are no longer needed, then assign the edited set of requirements links to the object.

Please refer to the following simplified example where we want to delete the 4th requirement link from a block in the top level of a model, such that the path of the block is 'model/block'.

1. If you do not already have it, get the path to the object you want to remove links from

2. Get the current links for that object using the following command:

>> reqLinks = rmi('get','model/block')

3. The output of this command will be a structure containing all of the current links. The contents of the structure are described in the following documentation:

https://www.mathworks.com/help/slrequirements/ref/rmi.html#bual8ai-3

4. Remove the rows of the structure corresponding to the links you wish to remove. for example, removing the 4th link:

>> reqLinks(4,:) = [] % remove the 4th row

5. Now pass the new requirements link into the rmi function

>> rmi('set','model/block',reqLinks) % pass the updated links structure

6. The block will now have the requirement link removed. You can confirm this by calling the 'get' command from step 2 again.

Related Solutions

MATLAB: How to link Simulink requirements to specific states within a Stateflow chart

You can have a Stateflow.Object or a numeric ID for the Stateflow object as one of the arguments to the "rmi" function. You can refer to the following link for more information:

https://www.mathworks.com/help/releases/R2017b/slrequirements/ref/rmi.html

To get hold of the Stateflow.State objects, you can run the following commands in the MATLAB command window:

>> modelObj = get_param(bdroot, 'Object')
>> sfStates = find(modelObj, '-isa', 'Stateflow.State')

Now you have all the states, and you can link any one by using sfStates(n) as the second argument to the "rmi" function. For example:

>> rmi('cat', sfStates(1), reqSimLinks(iList))

Alternatively, you can use the numeric ID of the specific state. You can check the state ID by executing sfStates(n) in the MATLAB command window and checking the information it displays. For example:

>> sfStates(1)

If the ID is 24, for example, you can use it as follows:

>> rmi('cat', 24, reqSimLinks(iList))

You could also find a specific state by providing a 'name argument'. For example:

>> warmupState = find(modelObj, '-isa', 'Stateflow.State', 'name', 'warmup')
>> rmi('cat', warmupState, reqSimLinks(iList))

MATLAB: How to programmatically replace a referenced model with a Subsystem in Simulink

Assuming that you have a 'parent.slx' model which references a model 'child.slx' (whose block name is 'Model' in the parent Simulink model), use either of the following options:

>> open_system('parent');

>> add_block('built-in/Subsystem',['parent/mySub']);

>> load_system('child');

>> Simulink.BlockDiagram.copyContentsToSubsystem('child',['parent/mySub']);

>> pos = get_param('parent/Model','position');

>> delete_block('parent/Model');

>> set_param('parent/mySub','position',pos);

>> open_system('parent');

>> load_system('child');

>> convert2subsys('child');

>> add_block('child/Subsystem','parent/mySub');

>> pos = get_param('parent/Model','position');

>> delete_block('parent/Model');

>> set_param('parent/mySub','position',pos);

>> close_system('child',0);

where 'convert2subsys' is defined at the following link:

https://uk.mathworks.com/help/simulink/slref/simulink.blockdiagram.createsubsystem.html#br5mgzk-6

Please refer to the attachment for further details.

Best Answer

Related Solutions

MATLAB: How to link Simulink requirements to specific states within a Stateflow chart

MATLAB: How to programmatically replace a referenced model with a Subsystem in Simulink

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