How to set "Argument" property of a Simulink.Parameter programmatically ?

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Hello,
I am trying to find a way to programmatically (in MATLAB) set the "Argument" property of a Simulink.Parameter Object which is defined in a Model Workspace.
Using the function getVariablePart this way:
setVariablePart(ModelWorkspace,'Parameter.Argument','on')
will result in following error:
Unrecognized property 'Argument' for class 'Simulink.Parameter'.
Would be very helpful if someone could help.
Kind regards

Answers (2)

Fangjun Jiang
Fangjun Jiang on 30 Nov 2023
See below, A Simulink.Parameter object does not have a property called "Argument".
a=Simulink.Parameter
a =
Parameter with properties: Value: [] CoderInfo: [1×1 Simulink.CoderInfo] Description: '' DataType: 'auto' Min: [] Max: [] Unit: '' Complexity: 'real' Dimensions: [0 0]
  4 Comments
Paul
Paul on 1 Dec 2023
That doc page inludes this statement: " If you decide to re-promote these arguments, set the Argument field to true. "
What does "re-promote" mean?
Fangjun Jiang
Fangjun Jiang on 1 Dec 2023
Edited: Fangjun Jiang on 1 Dec 2023
My understanding.
The first part of the document describes how to set up parameters for the model (or it is called model arguments). So the "Argument" option checkbox for those two parameters are checked.
The second part describes how to use multiple instances of this model. But when referencing the model, the "Argument" option checkbox for those two parameters are un-checked by default, which means, for any instances, the value for those parameters is still taking the default value in the referenced model and not passed from the main model. The user have to re-check the "Argument" option checkbox at the interface of the particular instance (programmingly or manually, right click the reference block, Block Parameters ModelReference, Instance Parameters) to bring it to the interface of the model block and provide values from the workspace of the main model.
"Promote" probably means to move the parameter from internal to the interface. The first part says "promote it myself" or " make it possible to be promoted". The second part says (from external) "not promoted by default", but a user can "promote it explicitly" or "re-promote".

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Jerbin J
Jerbin J on 19 Feb 2024 at 10:42
% To set Argument property of a Simulink.Parameter
% a ,b ,c are parameters in model workspace
set_param(bdroot,'ParameterArgumentNames','a,b,c');
% To uncheck Argument property of a Simulink.Parameter, remove it from the command
set_param(bdroot,'ParameterArgumentNames','a,c');
  1 Comment
Fangjun Jiang
Fangjun Jiang on 19 Feb 2024 at 14:27
This approach can set the 'ParameterArgumentNames' property of the model itself, but it can not set the 'ParameterArgumentNames' of the "Model" block that references the model.
>> set_param(bdroot,'ParameterArgumentNames','a,b,g')
>> gcb
ans =
'untitled/Model'
>> set_param(gcb,'ParameterArgumentNames','a,b,g')
ModelReference block parameter 'ParameterArgumentNames' is read-only

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