matlab.lang.OnOffSwitchState class

Package:matlab.lang

Represent on and off states with logical values

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Description

matlab.lang.OnOffSwitchState是从logicalclass. Use this class to specify the data type of properties that accept values of'on'和'off'和逻辑真的,false,1, or0.

Use this class to constrain property values to any of these values:

Class	Logical True	Logical False
Character vector	`'on'`	`'off'`
String scalar	`"on"`	`“离开”`
Logical	`真的`	`false`
Logical and numeric	`1`	`0`
Enumeration member	`matlab.lang.OnOffSwitchState.on`	`matlab.lang.OnOffSwitchState.off`

BecauseOnOffSwitchState来源于logicalclass, you can use these enumeration members in logical expressions.

枚举成员

`off`	Logical false
`上`	Logical true

Examples

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Enable Property Values to Be Logical or on/off

Create a class to represent the state of a computer whose power and monitor can be turned on and off separately. UseOnOffSwitchStateto define the class of these properties.

classdefSystemState特性Powermatlab.lang.OnOffSwitchState='off'监视器matlab.lang.OnOffSwitchState='off'endmethodsfunctionval = isOn(obj)if〜（obj..power && obj.monitor）val = matlab.lang.onoffswitchstate.off;elseval = matlab.lang.OnOffSwitchState.on;endendendend

Create aSystemStateobject and set the property values to'on'.

a = SystemState; a.Power ='on'; a.Monitor ='on';

Call theisOn方法确定的状态the system. The method returns a logical value provided by theOnOffSwitchStateenumeration.

ifison（a）...% System is ready to useend

More About

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Specialized Concatenation Behavior

TheOnOffSwitchStateclass enables you to form text expressions by concatenating enumeration members with character vectors or strings. For example, if an object property namedPower包含枚举成员OnOffSwitchStateclass, you can form a character array with a character vector and the property value:

a = SystemState; a.Power = true; ['The power switch is currently ' a.Power]

ans = 'The power switch is currently on'

通常，当通过将角色向量或字符串与枚举成员串联或字符串形成数组时，MATLAB^®attempts to convert the text to the class of the enumeration member. However, theOnOffSwitchStateclass defines specialized behavior that enables concatenation of enumeration members and text in cases where the text does not correspond to enumeration members defined by the class. In these cases, MATLAB creates an array of the same type as the text.

Here are the rules that MATLAB applies when concatenating character vectors or strings with enumeration members of theOnOffSwitchStateclass.

If all array elements are eitherOnOffSwitchStateenumeration members or character vectors, all enumeration members are converted to theircharequivalent representation. The resulting array is of typechar.
If all array elements are eitherOnOffSwitchStateenumeration members or strings, all enumeration members are converted to theirstringequivalent representation. The resulting array is of typestring.
If all array elements are eitherOnOffSwitchStateenumeration members, strings, or character vectors, all enumeration members and character vectors are converted to theirstringequivalent representation. The resulting array is of typestring.
In all other cases, normal concatenation rules apply. For more information, seeConcatenating Objects of Different Classes.

Testing for Equality

TheOnOffSwitchState班级支持万博1manbetxeq(==) andisequalfunctions for testing equality between enumeration members and char, string, logical, or numeric types having values of 1 or 0.

Version History

Introduced in R2017a