Method Input within Function (or something like that)

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Lucas Russi 2019-10-28

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链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/487857-method-input-within-function-or-something-like-that

回答： Lucas Russi 2019-10-28

function [Matrix,SubcomponentMatrix] = myfunction(other things + SubcomponentMatrix)
for i=1:length(something)
element = Nodes(List{i,2}).(List{i,3})...
            (List{i,6});
        
            element = update(element,SubcomponentMatrix,i);
end
    

where element is a class instance

and update is a method

    function obj = update(obj,SubcomponentMatrix,i)
                for m=3:sum(~cellfun(@isempty,SubcomponentMatrix(i,:)),2) %length var therefore only consider non empty cells
                x = SubcomponentMatrix{i,m}.property1;
                y(m-2,1) = SubcomponentMatrix{i,m}.y(x+1);
                end
                obj.K = 1-min(y);
                
        end

SubcomponentMatrix is a cell that contains classes of a different type

The first two colums of SubcomponentMatrix contain some sort of ID and don't contain relevant information

I'm pretty sure I didn't catch something basic on OOP - the error is "not enough Input arguments" in update

I'm very grateful for any help.

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Guillaume 2019-10-28

Ok, so the problem is with myfunction, not with update. What is the actual signature of myfunction, and more importantly, how did you call it?

Have you really given us the full text of the error message? The answer to these questions would have been in the rest of the error message.

Lucas Russi 2019-10-28

编辑：Guillaume 2019-10-28

在 MATLAB Online 中打开

Error in myfunction (line 19)
        element = update(element,SubcomponentMatrix,i);
Error in Process (line 51)
        [A] = myfunction(System_Matrix, Nodes,...
Error in Main (line 101)
Process
Error Run (line 162)
 Main

no sorry, thats everything

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采纳的回答

Guillaume 2019-10-28

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/487857-method-input-within-function-or-something-like-that#answer_398561

在 MATLAB Online 中打开

What this error is telling you:

Not enough input arguments.
Error in myfunction (line 19)
        element = update(element,SubcomponentMatrix,i);

is that when the code reaches line 19 of myfunction you try to use one of the input arguments of myfunction but that input argument wasn't specified when you called myfunction. That not enough input arguments refers to myfunction, not to update. The reason it occurs on line 19 is because that's the first line where you try to use that missing input.

Since both element and i are created inside the function, it must be SubcomponentMatrix that's missing. Unfortunately, the full call of myfunction (what a bad name!) is hidden in the ... you've used to replace the rest of the error but clearly at line 51 of process, you're not passing enough input arguments to myfunction. If you don't pass the SubcomponentMatrix input, then yes, you can't use it.