Specifications for generating code for the parameter object, returned as a Simulink.CoderInfo object.

This property is read only. Instead, modify the properties of the Simulink.CoderInfo object that this property contains.

For example, the StorageClass property of the Simulink.CoderInfo object determines how Simulink^® code generation toolboxes allocate memory for the parameter object in the generated code. For more information, see C Code Generation Configuration for Model Interface Elements (Simulink Coder) and Choose Storage Class for Controlling Data Representation in Generated Code (Embedded Coder).

Numeric complexity of the parameter value, returned as 'real' (if the value is real) or 'complex' (if the value is complex). Simulink determines the complexity from the parameter value that you specify in the Value property. This property is read only.

Data Types: char

Data type of the parameter value in the Value property, specified as 'auto' or a character vector. When you simulate the model or generate code, Simulink casts the value to the specified data type.

If you specify 'auto', the default setting, the parameter object uses the same data type as the block parameters that use the object. See Reduce Maintenance Effort with Data Type Inheritance.

When you set the Value property to something other than a double number, the object typically sets the DataType property based on the value of the Value property. For example, when you set the Value property to int8(5), the object sets the value of the DataType property to 'int8'.

To explicitly specify a built-in data type (see Data Types Supported by Simulink), specify one of these options:

To specify a fixed-point data type, use the fixdt function. For example, specify 'fixdt(1,16,5)'.

If you use a Simulink.AliasType or Simulink.NumericType object to create and share custom data types in your model, specify the name of the object.

To specify an enumerated data type, use the name of the type preceded by Enum:. For example, specify 'Enum: myEnumType'.

When you store a structure or array of structures in the Value property of the object, the object sets the DataType property to 'struct'. To specify a Simulink.Bus object as the data type, use the name of the bus object preceded by Bus:. For example, specify 'Bus: myBusObject'.

Example: 'auto'

Example: 'int8'

Example: 'fixdt(1,16,5)'

Example: 'myAliasTypeObject'

Example: 'Enum: myEnumType'

Example: 'Bus: myBusObject'

Data Types: char

Custom description of the parameter object, specified as a character vector. Use this property to document the significance that the parameter object has in your algorithm.

If you have an Embedded Coder^® license, you can configure this description to appear in the generated code as a comment. See Simulink data object descriptions (Embedded Coder).

Example: 'This parameter represents the maximum rotation speed of the engine.'

Data Types: char

Dimensions of the value stored in the Value property, returned as a row vector or specified as a character vector.

When you set the Value property of the object, the object sets the value of the Dimensions property to a double row vector. The vector is the same vector that the size function returns.

If you are configuring the object as a model argument, and you intend to provide a value for the object elsewhere in the parent model reference hierarchy, you can leave the Value property empty (set to '[]') and set the Dimensions and Data Type properties explicitly. See Parameterize Instances of a Reusable Referenced Model. To restore the Dimensions property as a value derived from the Value property, set Dimensions to '[]'.

To use symbolic dimensions, specify a character vector. See Implement Dimension Variants for Array Sizes in Generated Code (Embedded Coder).

Example: [1 3]

Example: '[1 myDimParam]'

Data Types: double | char

Maximum value that the Value property of the object can store, specified as a real double scalar.

The default value is empty, which means the parameter value does not have a maximum.

If you store a complex number in the Value property, the Max property applies separately to the real and imaginary parts.

If you store a structure in the Value property, the object ignores the Max property. Instead, use a Simulink.Bus object as the data type of the parameter object and specify a maximum value for each field by using the elements of the bus object. See Control Field Data Types and Characteristics by Creating Parameter Object.

If Value is greater than the maximum value or if the maximum value is outside the range of the object data type, Simulink generates a warning. When updating the diagram or starting a simulation, Simulink generates an error.

For more information about how Simulink uses this property, see Specify Minimum and Maximum Values for Block Parameters.

Example: 5.32

Data Types: double

Minimum value that the Value property of the object can store, specified as a real double scalar.

The default value is empty, which means the parameter value does not have a minimum.

If you store a complex number in the Value property, the Min property applies separately to the real and imaginary parts.

If you store a structure in the Value property, the object ignores the Min property. Instead, use a Simulink.Bus object as the data type of the parameter object and specify a minimum value for each field by using the elements of the bus object. See Control Field Data Types and Characteristics by Creating Parameter Object.

If Value is less than the minimum value or if the minimum value is outside the range of the object data type, Simulink generates a warning. When updating the diagram or starting a simulation, Simulink generates an error.

For more information about how Simulink uses this property, see Specify Minimum and Maximum Values for Block Parameters

Example: -0.92

Data Types: double

Physical unit of parameter value, specified as a character vector that describes a valid unit. For more information, see Unit Specification in Simulink Models.

Example: 'degC'

Data Types: char

Value to use in block parameters, specified as any of these valid values:

If you use a Simulink.Parameter object to set the block parameter value in a reusable referenced model, you can compile and simulate the model as a referenced model with the value for the object left empty (Value set to '[]') as long as you provide an explicit value somewhere in the parent model reference hierarchy. In this case, you cannot simulate the model directly. When the value is empty, you must provide the Data Type and Dimensions for the object. Although you have specified an empty value, Simulink still synthesizes a Value by using one of these:

See Parameterize Instances of a Reusable Referenced Model.

You can also use MATLAB^® syntax to specify the value.

To use a Simulink.Parameter object to store a value of a particular numeric data type, specify the ideal value with the Value property and control the type with the DataType property.

If you set the Value property by using a typed expression such as single(32.5), the DataType property changes to reflect the new type. A best practice is to use an expression that is not typed to avoid accumulating numerical error through repeated quantizations or data type saturation, especially for fixed-point data types.

Example: 3.15

Example: 1.2 + 3.2i

Example: true

Example: myEnumType.myEnumValue

Example: struct('field1',15,'field2',7.32)

Example: slexpr('myVar + myOtherVar')

Data Types: double | single | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64 | logical | struct | fi | enum
Complex Number Support: Yes