Lookup table object from another object

Question

Thomas LE DIOURON 2024-3-1

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2089116-lookup-table-object-from-another-object

回答： Pramil 2024-3-27

I have an object (from a specific class) that contains a structure of lookup tables:

taxi = 
  TaxiProfile with properties:
              data: [6×5 double]
     waitingStruct: [1×1 struct]
         distances: [6×1 double]
    distancesCumul: [6×1 double]
        velocities: [6×1 double]
            slopes: [6×1 double]
           windSpd: [6×1 double]
      lookupTables: [1×1 struct]
      
>> taxi.lookupTables
ans = 
  struct with fields:
    velocities: [1×1 Simulink.LookupTable]
        slopes: [1×1 Simulink.LookupTable]
       windSpd: [1×1 Simulink.LookupTable]

I would like to use this object to reference the different lookup tables in a Simulink 1-D Lookup Table. In the "Data Specification", I select "Lookup table object" and in the name: "taxi.lookupTables.velocities"

In this case, there is an error "Invalid setting in '1-D Lookup Table' for parameter 'LookupTableObject'

By setting the following variable and specifying only velocities in the field name of the Data Specification of the 1-D Lookup table, it works

velocities = taxi.lookupTables.velocities

Is it a bug?

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Thomas LE DIOURON 2024-3-1

Fangjun Jiang 2024-3-2

Type taxi.lookupTables.velocities in Command Window to see what it is? The dimension could be different. Is it a 1-D lookup table?

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Answer 1

Pramil 2024-3-27

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2089116-lookup-table-object-from-another-object#answer_1431866

Hi Thomas, It is not a bug.

As of MATLAB R2023b, it is not possible to directly reference a “Lookup Table” object through another object. This limitation arises because the “Lookup Table” object must be defined in the workspace for it to be referenced in the block parameters.

Hope it helps.