# fa wu

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**Feeds**

Question

The mathematical expressions resulting from two different symbolic computations are significantly different.

The mathematical expressions resulting from two different symbolic computations are significantly different. Does this suggest t...

3 månader ago | 1 answer | 0

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answerQuestion

How to Generate Subscripted Arrays in Live Scripts

I would like to generate the following array or matrix. The symbolic variable Z needs to have a subscript of 1。And can be used i...

3 månader ago | 2 answers | 0

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answersQuestion

I got Inf when calculating 13959^475, how can I solve this problem?

I want to verify the RSA encryption algorithm. But I encountered a numerical calculation problem during the decryption operation...

4 månader ago | 3 answers | 0

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answersQuestion

Regarding the significance of abstract classes in Matlab, is my understanding correct?"

In C++, runtime polymorphism requires the presence of abstract classes or interfaces. However, in Matlab, achieving polymorph...

8 månader ago | 0 answers | 0

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answersQuestion

Can object properties be assigned in bulk without the need for a loop statement?

Please take a look at lines 15 to 17 of the following code, where a loop is used to copy two properties of an object to two prop...

10 månader ago | 1 answer | 0

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answerQuestion

Is there more direct evidence indicating that the values of enumeration members are referenced by the constructor of the enumeration class?

In the book I've read, it was mentioned that the values of enumeration members are passed as parameters to the constructor of th...

10 månader ago | 0 answers | 0

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answersQuestion

Why does the rand function in the assignment statement within the class's property only work once?

Define Class Properties with ConstantValues tell us:"MATLAB evaluates the expressions when loading the class" classdef NamedCon...

10 månader ago | 2 answers | 0

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answersQuestion

Several questions about overload the 'copyElement' method in subclasses of 'matlab.mixin.Copyable'

The matlab.mixin.Copyable page describes the following information: 1、The copy method makes a shallow copy of the object 2、cop...

10 månader ago | 0 answers | 1

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answersQuestion

What software functionality requires triggering callback functions by adding or removing dynamic attributes?

In MATLAB, it appears that only 'dynamic properties' can trigger built-in events（PropertyAdded/PropertyRemoved） when added or re...

11 månader ago | 0 answers | 0

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answersQuestion

Why do we need to use dynamic properties?

Why do we need to use dynamic properties? In what situations must we use dynamic properties? What value do they bring? If I must...

11 månader ago | 1 answer | 0

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answerQuestion

What is the difference between 'Property Get and Set Methods' and the 'set' function?

'Property Get and Set Methods' are abbreviated as 'Pset,' while the'set/get' function is abbreviated as 'set/get' functions "In...

11 månader ago | 2 answers | 0

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answersQuestion

Is there a good way here to allow users to both retain access control for properties and overload indexing methods?

Assuming a member within a class has private access properties, i.e., GetAccess=private, if we use a "." type reference for that...

11 månader ago | 1 answer | 0

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answerHow to overload A{n} in a custom class?

Although I'm still not entirely clear about the meaning of the following code segment (I feel like it's misleading), I have succ...

11 månader ago | 0

| accepted

Question

How to overload A{n} in a custom class?

Background knowledge subsref Some explanations in the book (published in 2014)： When overloading the subsref method, you can ...

11 månader ago | 1 answer | 0

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answerQuestion

Is there a specific standard for the rows and columns of a struct?

In the book I read, there is no specific standard for the rows and columns of a struct. However, based on examples, it appears t...

11 månader ago | 2 answers | 0

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answersQuestion

Why wasn't the PreGet event triggered?

Originally, this example was meant to validate the AbortSet property, but I've encountered another issue. The problem is that th...

11 månader ago | 0 answers | 0

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answersQuestion

How can I access the properties of A class in B class without creating objects?

Here is the sample ， PropertyAccess allow ClassA get property ‘Prop1’，But you must creat a PropertyAccess object in Class A. Thi...

11 månader ago | 2 answers | 0

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answersQuestion

Is there any matlab documentation that can explain why multiplying empty arrays gives zero matrices?

Is there any matlab documentation that can explain why multiplying empty arrays gives zero matrices? Here is the sample A=doub...

11 månader ago | 1 answer | 1

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answerQuestion

Do built-in classes have hidden properties storing "dimension information," and how can I find these hidden properties?

Do built-in classes have hidden properties storing "dimension information," and how can I find these hidden properties? This is...

11 månader ago | 1 answer | 0

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answerQuestion

Why can an empty array constructed from a built-in class perform multiplication, while an empty array generated from my custom class cannot perform multiplication?

Here is the example It is work. A=double.empty(5,0); B=double.empty(0,5); C=A*B C = 0 0 0 0 0 0 0 ...

11 månader ago | 1 answer | 0

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answerQuestion

What exactly are Handle Compatible Classes? Are they a combination of handle and non-handle classes?

I read Handle Compatible Classes, the page say"Typically, when deriving a MATLAB® class from other classes, all the superclasses...

11 månader ago | 1 answer | 2

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answerQuestion

Why does MATLAB set the Method Attributes of built-in methods to 'Hidden'?

'empty' is matlab built-in method."At the bottom of the documentation page, it is mentioned: 'empty is a hidden, public, static ...

11 månader ago | 0 answers | 0

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answersQuestion

In what situations do we need to use the `empty` method? What benefits does the `empty` method provide?

method empty creat an empty array.In what situations do we need to use the `empty` method? What benefits does the `empty` method...

11 månader ago | 1 answer | 1

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answerQuestion

How can I assign a set of data from a 'meta.class' object propertys to a string array without using a loop statement?

When I run 'mc=?ClassA' in command line, I got a meta.class object mc. mc.MethodList.Name store all the motheds of ClassA I ru...

11 månader ago | 1 answer | 0

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answerQuestion

Where was the empty array created?

My understanding of classes: one of the roles of class properties is to store data. When I run the following command, x=Base....

11 månader ago | 1 answer | 1

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answerQuestion

Where does the `empty` method come from?

The code come from this book 4.1.3 Then input mc=?SubClass in command line and open mc-->MethodList in workspace,you will fi...

11 månader ago | 1 answer | 0

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answerQuestion

Why are properties stored in "event.PropertyEvent.AffectedObject" instead of objects?

Listen for Changes to Property Values tell us :Define Callback Function for Property Event The listener executes the callback f...

11 månader ago | 0 answers | 0

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answersWhy does the callback function create an 'meta.property 'object

I got the answer the documents Listen for Changes to Property Values：Define Callback Function for Property Event The listener ...

11 månader ago | 0

| accepted

Question

Why does the callback function create an 'meta.property 'object

When you wanna instantiate an object. First you need creat a class or you already have a class. Then you use a class to instanti...

11 månader ago | 1 answer | 0

### 1

answerQuestion

How to freeze 'get method' while debugging program

For example，Add a program breakpoint on the 21th line“notify(obj,'UpdateGraph');” 24th line “[x,y] = MFunEval.grid(obj.Lm);” T...

11 månader ago | 0 answers | 0