How to test if an object is a simulink.parameter ?

Hi,

Short question: How can I test if an object is a simulink parameter ?

Context:

Simulink data dictionaries allows mutliple type.

I'm getting dataEntries, but after than, I need specific function to get the data entries properties, such as value.

What i tried:

1 / I could use listEntry, but unfortunatelly it cannot be saved in a variable (tested with MATLAB R2022B)

myDictionaryObj = Simulink.data.dictionary.open('sldemo_fuelsys_dd_controller.sldd');
>> listEntry(myDictionaryObj,'Class','Simulink.Parameter')
  Section       Name          Status   DataSource                          LastModified       LastModifiedBy        Class                

  Design Data   hys                    sldemo_fuelsys_dd_controller.sldd   2013-10-22 10:05   The MathWorks, Inc.   Simulink.Parameter   
  Design Data   max_ego                sldemo_fuelsys_dd_controller.sldd   2015-12-17 00:10   The MathWorks, Inc.   Simulink.Parameter   
  Design Data   max_press              sldemo_fuelsys_dd_controller.sldd   2015-12-17 00:10   The MathWorks, Inc.   Simulink.Parameter   
  Design Data   max_speed              sldemo_fuelsys_dd_controller.sldd   2015-12-17 00:10   The MathWorks, Inc.   Simulink.Parameter   
  Design Data   max_throt              sldemo_fuelsys_dd_controller.sldd   2015-12-17 00:10   The MathWorks, Inc.   Simulink.Parameter   
  Design Data   min_press              sldemo_fuelsys_dd_controller.sldd   2015-12-17 00:10   The MathWorks, Inc.   Simulink.Parameter   
  Design Data   min_speed              sldemo_fuelsys_dd_controller.sldd   2015-12-17 00:11   The MathWorks, Inc.   Simulink.Parameter   
  Design Data   min_throt              sldemo_fuelsys_dd_controller.sldd   2015-12-17 00:10   The MathWorks, Inc.   Simulink.Parameter   
  Design Data   PressEst               sldemo_fuelsys_dd_controller.sldd   2015-12-17 00:11   The MathWorks, Inc.   Simulink.Parameter   
  Design Data   PressVect              sldemo_fuelsys_dd_controller.sldd   2015-12-17 00:09   The MathWorks, Inc.   Simulink.Parameter   
  Design Data   PumpCon                sldemo_fuelsys_dd_controller.sldd   2013-10-22 10:33   The MathWorks, Inc.   Simulink.Parameter   
  Design Data   RampRateKiX            sldemo_fuelsys_dd_controller.sldd   2013-10-22 10:05   The MathWorks, Inc.   Simulink.Parameter   
  Design Data   RampRateKiY            sldemo_fuelsys_dd_controller.sldd   2013-10-22 10:05   The MathWorks, Inc.   Simulink.Parameter   
  Design Data   RampRateKiZ            sldemo_fuelsys_dd_controller.sldd   2013-10-22 10:33   The MathWorks, Inc.   Simulink.Parameter   
  Design Data   SpeedEst               sldemo_fuelsys_dd_controller.sldd   2015-12-17 00:11   The MathWorks, Inc.   Simulink.Parameter   
  Design Data   SpeedVect              sldemo_fuelsys_dd_controller.sldd   2015-12-17 00:10   The MathWorks, Inc.   Simulink.Parameter   
  Design Data   ThrotEst               sldemo_fuelsys_dd_controller.sldd   2015-12-17 00:11   The MathWorks, Inc.   Simulink.Parameter   
  Design Data   ThrotVect              sldemo_fuelsys_dd_controller.sldd   2015-12-17 00:10   The MathWorks, Inc.   Simulink.Parameter   
  Design Data   zero_thresh            sldemo_fuelsys_dd_controller.sldd   2013-10-22 10:05   The MathWorks, Inc.   Simulink.Parameter
>> iWillFail = listEntry(myDictionaryObj,'Class','Simulink.Parameter')
Incorrect number or types of inputs or outputs for function 'listEntry'.

I don't know if this is a bug or expected behavior

2/ I wanted to use : 'isa', but it does not allow to test for Simulink parameter

Answer 1

[Paul]

Hi Alexandre

Use find on dictionary section object to find the entries that meet the desired criterion.

>> myDictionaryObj = Simulink.data.dictionary.open('sldemo_fuelsys_dd_controller.sldd');
>> dDataSectObj = getSection(myDictionaryObj,'Design Data');
>> foundEntries = find(dDataSectObj,'-value','-class','Simulink.Parameter')
>> foundEntries(1)

ans = 

  Entry with properties:

              Name: 'RampRateKiX'
             Value: [1×1 Simulink.Parameter]
        DataSource: 'sldemo_fuelsys_dd_controller.sldd'
      LastModified: '2013-Oct-22 08:05:23.609681'
    LastModifiedBy: 'The MathWorks, Inc.'
            Status: 'Unchanged'

>> foundEntries(1).getValue

ans = 

  Parameter with properties:

          Value: [128 256 384 512 640]
      CoderInfo: [1×1 Simulink.CoderInfo]
    Description: ''
       DataType: 'auto'
            Min: []
            Max: []
           Unit: ''
     Complexity: 'real'
     Dimensions: [1 5]

[Alexandre Poisson]

thanks !