在MATLAB中从一个类的一个函数中调用变量到另一个函数中

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英文:

Calling variables from one function to another in a class to in MATLAB

问题

我有主脚本文件和一个类文件。在类文件中，我有两个函数（funk 和 funk1），在这些函数中，我有一些变量，我从主脚本中调用这些变量。

然而，如果我在类的一个函数中有一个变量，如何在类的另一个函数中使用相同的变量（可以是输入或输出）？以下是一个示例。

  1. classdef ga_clas
  2. % 电池约束
  3. properties
  4.  %Property1
  5. end
  6. methods (Static)
  7.  function[a,b,c,d]=funk(f,g,h,i,j,k,l) 
  8.   % 所有输入的值都来自主脚本 
  9.   for j=1:24
  10.    g(j)=f(j)+k(j)
  11.   end 
  12.   % g 是类中的变量，可以在另一个函数中用作输出，我不确定我是否使用正确。
  13.  end
  14.  function [g, M, N]=funk1(t,y,u,i,f)
  15.   % 如果我需要使用前一个函数（funk1）中的变量，它可以是输入或输出，那么我可以在这里使用吗？
  16.  end 
  17. end
  18. end
英文:

I have the main script file and a class file. In the class file, I have two functions (funk and funk1) and in the functions, I have several variables which I call from the main script.

However, if I have a variable in one function of the class, how can I use the same variable in another function of the class (it could be both as input or output)? Below is an example.

  1. classdef ga_clas
  2. % The battery constraints
  3. properties
  4.  %Property1
  5. end
  6. methods (Static)
  7.  function[a,b,c,d]=funk(f,g,h,i,j,k,l) 
  8.   % The value of all input are from main script 
  9.   for j=1:24
  10.    g(j)=f(j)+k(j)
  11.   end 
  12.   % g is the variable in the class that can be used as output in another function, I'm not sure whether I'm using it correctly or not.
  13.  end
  14.  function [g, M, N]=funk1(t,y,u,i,f)
  15.   % and If I have to use variables from the previous function (funk1) which could be input or output then can I use it here?
  16.  end 
  17. end
  18. end

答案1

得分: 2

1: 正如Cris Luengo提到的，你可以返回g。代码如下所示：

  1. function [a, b, c, d, g] = funk(f, g, h, i, j, k, l) 
  2.   for j = 1:24
  3.    g(j) = f(j) + k(j);
  4.   end 
  5. end

然后，当你调用funk函数时，可以这样做：

  1. main
  2. %其他代码
  3. [a, b, c, d, g] = ga_class(f, g, h, i, j, k, l)

2: 将g设置为ga_class的属性：

  1. properties
  2.   g = [] %我不知道g的类型，可以赋值为0或其它类型
  3. end
  4. methods (Static)
  5.  function [a, b, c, d] = funk(self, f, g, h, i, j, k, l) 
  6. %传入的self将是ga_class的实例
  7.   for j = 1:24
  8.    g(j) = f(j) + k(j);
  9.   end 
  10.   self.g = g; %这将把它分配给这个方法的属性
  11.  end

然后，稍后你可以这样调用：

  1. ga_class.g

你很可能想要选择第一种方式，但第二种方式也是可行的。

英文:

There's two ways of doing this.

1: as Cris Luengo mentioned, you can return g. This would look something like this:

  1. function[a,b,c,d,g]=funk(f,g,h,i,j,k,l) 
  2.   for j=1:24
  3.    g(j)=f(j)+k(j)
  4.   end 
  5. end

Then, when you call funk you would do:

  1. main
  2. %other code
  3. [a, b, c, d, g] = ga_class(f, g, h, i, j, k, l)

2: set g as a property of ga_class:

  1. properties
  2.   g = [] %i don't know what type g is could be assigned as 0 or whatever it's type is
  3. end
  4. methods (Static)
  5.  function[a,b,c,d]=funk(self, f,g,h,i,j,k,l) 
  6. %self being passed in would be an instance of ga_class
  7.   for j=1:24
  8.    g(j)=f(j)+k(j)
  9.   end 
  10.   self.g = g %this assigns it into this method's properties
  11.  end

Then, later you can call:
ga_class.g

You most likely want the first way, but it is possible to do it the second way.

huangapple
  • 本文由 发表于 2023年7月10日 20:44:20
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  • class
  • function
  • matlab
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