自定义对象索引
R2026a为您的类自定义索引引用和赋值
自定义对象的索引引用和赋值行为。用户定义的类拥有与 MATLAB® 内置类相同的索引行为，但您可以通过从一个或多个超类继承来修改此行为。
您可以通过模块化索引 mixin 类来单独自定义各索引操作。例如，您可以通过从 matlab.mixin.indexing.RedefinesParen 继承来自定义圆括号索引，同时对圆点和花括号索引使用默认 MATLAB 行为，而不编写额外的代码。
您也可以在类中重载 subsref 和 subsasgn 函数，但这种方法要求您重载圆括号、圆点和花括号索引，即使您只需自定义一种行为也是如此。请尽可能使用模块化索引类。
类
matlab.mixin.indexing.RedefinesParen | Customize class indexing operations that use parentheses |
matlab.mixin.indexing.RedefinesDot | Customize class indexing operations that use dots |
matlab.mixin.indexing.RedefinesBrace | Customize class indexing operations that use braces |
matlab.indexing.IndexingOperation | Type of customized indexing operation and referenced indices |
matlab.mixin.Scalar | Enforce scalar behavior for class instances |
matlab.mixin.indexing.ForbidsPublicDotMethodCall | Disallow calling public methods using dot notation |
matlab.mixin.indexing.OverridesPublicDotMethodCall | 用圆点表示法调用公共方法会调用重载的点索引 |
函数
builtin | 从已重载的方法执行内置函数 |
numArgumentsFromSubscript | 基于 subsref 和 subsasgn 的自定义索引的参量数目 |
matlab.indexing.isScalarClass | Determine whether input is scalar class (自 R2024b 起) |
listLength | Number of arguments returned from customized indexing operations |
subsref | 使用函数调用的索引引用 |
subsasgn | 使用函数调用进行下标赋值 |
subsindex | 将对象转换为数组索引 |
substruct | 创建索引结构体参量 |
主题
- 自定义对象索引
默认情况下，MATLAB 类支持对象数组索引。许多类设计不要求对此行为进行修改。
- Customize Parentheses Indexing for Mapping Class
This example shows how to customize parentheses indexing for a mapping class.
- Forward Indexing Operations
Forward additional levels of indexing after customized indexing operations.
- Overload end for Classes
Overload
endfor customized indexing applications. - Objects in Index Expressions
You can design objects that can be used as indices in indexing expressions.
- Code Patterns for subsref and subsasgn Methods
There are code patterns useful for modifying object indexing.
