Defining Data Arrays
Stateflow allows you to define arrays of data.
To define an array:
- 1
- Add a default data item to the data dictionary as a child of the state, chart,
or machine that needs to access the data (see "Adding Data to the Data
Dictionary" on page 3-14).
- 2
- Open the Data properties dialog. Check the Array checkbox on the dialog.
Set the item's Sizes property to the size of each of the array's dimensions
("Setting Data Properties").
- For example, to define a 100-element vector, set the Sizes property to
100.
To define a 2-by-4 array, set the sizes property to [2 4].
- 3
- Set the item's Initial Index property to the index of the array's first element.
- For example, to define a zero-based array, set the Initial Index property to
0.
- 4
- Set the item's Initial Value property to an appropriate value.
- For example, to specify that an array's elements be initialized to zero, set the
Initial Value property to
0.
- 5
- Set the item's other properties (e.g., Name, Type, and so on) to reflect its
intended usage.
Example
Suppose that you want to define a local, 4-by-4, zero-based array of type Integer named rotary_switches. Further, suppose that each element of the array was initially 1 and could have no values less than 1 or greater than 10. The following table shows the data property settings for such an array.
Property
|
Value
|
Name
|
rotary_switches
|
Scope
|
Local
|
Type
|
Integer
|
Sizes
|
[4 4]
|
First Index
|
0
|
Initial Value
|
1
|
Minimum
|
1
|
Maximum
|
10
|
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