Stateflow.SLFunction

Simulink function in chart, state, box, or function

Description

Use Stateflow.SLFunction objects to create Simulink^® functions that enable you to call Simulink subsystems in the actions of states and transitions. Typical applications include:

• Defining a function that requires Simulink blocks

• Scheduling execution of multiple controllers

For more information, see Reuse Simulink Functions in Stateflow Charts.

Creation

Syntax

function = Stateflow.SLFunction(parent)

Description

function = Stateflow.SLFunction(parent) creates a Stateflow.SLFunction object in a parent chart, state, box, or function.

Input Arguments

parent — Parent for new Simulink function

Stateflow.Chart object | Stateflow.State object | Stateflow.Box object | Stateflow.Function object

Parent for the new Simulink function, specified as a Stateflow^® API object of one of these types:

• Stateflow.Box

• Stateflow.Chart

• Stateflow.Function

• Stateflow.State

Properties

Stateflow API objects have properties that correspond to the values you set in the Stateflow Editor. To access or modify a property, use dot notation. To access or modify multiple properties for multiple API objects, use the get and set functions, respectively. For more information, see Modify Properties and Call Functions of Stateflow Objects.

Content

Name — Name of Simulink function

"" (default) | string scalar | character vector

Name of the Simulink function, specified as a string scalar or character vector.

LabelString — Label for Simulink function

"?" (default) | string scalar | character vector

Label for the Simulink function, specified as a string scalar or character vector.

IsExplicitlyCommented — Whether to comment out Simulink function

false or 0 (default) | true or 1

Whether to comment out the Simulink function, specified as a numeric or logical 1 (true) or 0 (false). Setting this property to true is equivalent to right-clicking the Simulink function and selecting Comment Out. For more information, see Comment Out Objects in a Stateflow Chart.

IsImplicitlyCommented — Whether Simulink function is implicitly commented out

true or 1 | false or 0

This property is read-only.

Whether the Simulink function is implicitly commented out, specified as a numeric or logical 1 (true) or 0 (false). The Simulink function is implicitly commented out when you explicitly comment out an object that contains it. If the Simulink function is contained in an atomic subchart or an atomic box, this property is false unless the explicitly commented object is also contained in the atomic subchart or atomic box.

IsCommented — Whether Simulink function is commented out

true or 1 | false or 0

Since R2023a

This property is read-only.

Whether the Simulink function is commented out, specified as a numeric or logical 1 (true) or 0 (false). This property is true when either IsExplicitlyCommented or IsImplicitlyCommented is true.

CommentText — Comment text

"" (default) | string scalar | character vector

Comment text added to the Simulink function, specified as a string scalar or character vector. This property applies only when the IsExplicitlyCommented property is true. In the Stateflow Editor, when you point to the comment badge on the Simulink function, the text appears as a tooltip. When you set the IsExplicitlyCommented property to false, the value of CommentText reverts to "".

Graphical Appearance

Position — Position and size of Simulink function

[0 0 90 60] (default) | [left top width height]

Position and size of the Simulink function, specified as a four-element numeric vector of the form [left top width height].

BadIntersection — Whether Simulink function intersects a box, state, or function

true or 1 | false or 0

This property is read-only.

Whether the Simulink function graphically intersects a box, state, or function, specified as a numeric or logical 1 (true) or 0 (false).

ContentPreviewEnabled — Whether to display preview of Simulink function contents

true or 1 (default) | false or 0

Whether to display a preview of the Simulink function contents, specified as a numeric or logical 1 (true) or 0 (false).

FontSize — Font size for Simulink function label

scalar

Font size for the Simulink function label, specified as a scalar. The StateFont.Size property of the chart that contains the Simulink function sets the initial value of this property.

Hierarchy

Chart — Chart that contains Simulink function

Stateflow.Chart object

This property is read-only.

Chart that contains the Simulink function, specified as a Stateflow.Chart object.

Subviewer — Subviewer for Simulink function

Stateflow.Chart object | Stateflow.State object | Stateflow.Box object | Stateflow.Function object

This property is read-only.

Subviewer for the Simulink function, specified as a Stateflow.Chart, Stateflow.State, Stateflow.Box, or Stateflow.Function object. The subviewer is the chart or subchart where you can graphically view the Simulink function.

Machine — Machine that contains Simulink function

Stateflow.Machine object

This property is read-only.

Machine that contains the Simulink function, specified as a Stateflow.Machine object.

Path — Location of parent in model hierarchy

character vector

This property is read-only.

Location of the parent of the Simulink function in the model hierarchy, specified as a character vector.

Identification

Description — Description

"" (default) | string scalar | character vector

Description for the Simulink function, specified as a string scalar or character vector.

Document — Document link

"" (default) | string scalar | character vector

Document link for the Simulink function, specified as a string scalar or character vector.

Tag — User-defined tag

[] (default) | any data type

User-defined tag for the Simulink function, specified as data of any type.

SSIdNumber — Session-independent identifier

scalar

This property is read-only.

Session-independent identifier, specified as an integer scalar. Use this property to distinguish the Simulink function from other objects in its parent chart.

Id — Unique identifier

scalar

This property is read-only.

Unique identifier, specified as an integer scalar. Unlike SSIdNumber, the value of this property is reassigned every time you start a new MATLAB^® session and may be recycled after an object is deleted.

Object Functions

find	Identify specified objects in hierarchy
getChildren	Identify children of object
getParent	Identify parent of object
getReferences	Identify references to symbol name
renameReferences	Rename symbol and update references to symbol name
commentedBy	Identify objects that implicitly comment out a graphical object
dialog	Open properties dialog box
view	Display object in editing environment
highlight	Highlight graphical object
fitToView	Zoom in on graphical object

Examples

Add Simulink Function to Chart

Add a Simulink function in the chart ch. Set its label to "[y1,y2] = f(x1,x2,x3)".

function = Stateflow.SLFunction(ch);
function.LabelString = "[y1,y2] = f(x1,x2,x3)";

Version History

Introduced in R2008b

R2023a: New object functions and properties

Stateflow.SLFunction objects have new object functions and properties:

• The object function getReferences returns the locations where a chart refers to the name of a Simulink function.

• The object function renameReferences renames a Simulink function and updates all references to the function name in the chart.

• The object function commentedBy identifies the explicitly commented objects that cause a Simulink function to be commented out.

• The property IsCommented indicates whether a Simulink function is commented out. This property replaces the object function isCommented.