MATLAB函数中的变量参数对 [英] Variable argument pairs in MATLAB functions

问题描述

我正在尝试开发一个包含多个参数的函数.为了尽可能强大，我希望能够如下调用我的函数:

I'm trying to develop a function that contains multiple arguments. To be as robust as possible, I want to be able to call my function as follows:

foo( x, y, z, 'OptionalArg1', bar, 'OptionalArg2', blah, 'OptionalArg3', val )

我希望我的函数足够健壮，以任何顺序包含这些参数的任何组合.如果未提供参数，我还需要能够设置默认值.在MATLAB中有标准的方法可以做到这一点吗?

I want my function to be robust enough to contain any combination of these arguments in any order. I also need to be able to set defaults if the argument is not provided. Is there a standard way to do this in MATLAB?

推荐答案

最好的方法是使用 inputParser 类，并带有addParameters函数.

The best way would be to use the inputParser class, with the addParameters function.

简而言之，您的代码如下所示:

In short, your code would look like:

function foo(x,y,z,varargin)

p=inputParser;

validationFcn=@(x)isa(x,'double')&&(x<5); % just a random example, add anything
addParameter(p,'OptionalArg1',defaultvalue, validationFcn);
% same for the other 2, with your conditions

%execute
parse(p,varargin{:});

% get the variables
bar=p.Results.OptionalArg1;
% same for the other 2


% foo

或者，您也可以像我一样编写自己的内容(

Alternatively, you could write your own as I did (example here). The code there is easily modifiable to have your own input parser (you just need to change the opts, and add a switch for each new opt.

但是inputParser更容易使用，更清晰.

But the inputParser is easier, and clearer to use.

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