how to use varagin with parameter

Question

piero 2023-9-18

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2022432-how-to-use-varagin-with-parameter

编辑： Matt J 2023-9-19

function definedAndVariableNumInputs(X,Y,varargin)
    disp("Total number of input arguments: " + nargin)
    
    formatSpec = "Size of varargin cell array: %dx%d";
    str = compose(formatSpec,size(varargin));
    disp(str)
if varargin{1}=="f"
    ??
end  
varargin{2}=="b"
  ??
end
acceptVariableNumInputs(3,4,"b")

hi,I want to call the function with additional parameters

If I pass the parameter called "f" I want to pass it the value 3

If I pass the "b" parameter I want to pass the value 5

(it's an example)

Now with varagin I can see the values I pass but not what they refer to... how to do this?

Example I just want to pass it the value of parameter "b" ..

How does the function understand that the only parameter passed refers to "b"?

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Voss 2023-9-19

It's not clear what you are trying to do.

Can you write down a few examples of how this function would be called and how it should interpret the input arguments in each case?

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Answer 1

Matt J 2023-9-19

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2022432-how-to-use-varagin-with-parameter#answer_1313567

编辑：Matt J 2023-9-19

在 MATLAB Online 中打开

Perhaps this is what you're looking for:

opts=myfunc(f=3)
opts = struct with fields:
    f: 3
    b: []
opts=myfunc(b=5)
opts = struct with fields:
    f: []
    b: 5
opts=myfunc(f=3,b=5)
opts = struct with fields:
    f: 3
    b: 5
function opts=myfunc(opts)
  arguments
    opts.f=[];
    opts.b=[];
  end
end

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Answer 2

Matt J 2023-9-19

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2022432-how-to-use-varagin-with-parameter#answer_1313582

编辑：Matt J 2023-9-19

在 MATLAB Online 中打开

Another possibility:

out=definedAndVariableNumInputs(10,20,f=3)
out = struct with fields:
    X: 10
    Y: 20
    f: 3
    b: []
function out=definedAndVariableNumInputs(X,Y,varargin)
 
 out.X=X;
 out.Y=Y;
 out.f=[];
 out.b=[];
 
 settings=struct(varargin{:});
 
 for f=string(fieldnames(settings));    
     out.(f)=settings.(f);
 end
end