Not enough input arguments.

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danielle sisserman 2020-10-24

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/624683-not-enough-input-arguments

评论： Stephen23 2020-11-5

Hi, I am very new to matlab and need some basic help.

function classifier = learnknn(k, d, m, Xtrain, Ytrain)
     classifier = {k, d, m, Xtrain, Ytrain};
end

I get the error " Not enough input arguments. "

But, I cannot change the first line of this code. Only the body of the function can be modified.

Thank you.

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danielle sisserman 2020-11-5

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Thank you Walter.

so if I understand,

function classifier = learnknn(k, d, m, Xtrain, Ytrain)

is actually all I need? no

end

keyword?

and what if I wanted the classifier function to return a diferent datastructure than a cell?

for example, if I wanted to return a list object containing the input objects.

Thankyou.

Stephen23 2020-11-5

"so if I understand, function classifier = learnknn(k, d, m, Xtrain, Ytrain) is actually all I need?"

No, the syntax that Walter Roberson showed replaces your entire function. It uses the special varargin variable:

https://www.mathworks.com/help/matlab/ref/varargin.html

"and what if I wanted the classifier function to return a diferent datastructure than a cell? for example, if I wanted to return a list object containing the input objects."

MATLAB does not have a "list" type:

https://www.mathworks.com/help/matlab/matlab_prog/fundamental-matlab-classes.html

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