Passing function handle to another function and assigning varying number of input arguments to it

Question

Hossein 2012-4-20

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/36051-passing-function-handle-to-another-function-and-assigning-varying-number-of-input-arguments-to-it

Hi,

I am trying to write a code in which I need to pass a handle function to another function, let say

   function b=myfun1(a)
   b=2*a;
   end
   function b=myfun2(handle_f,a)
   b=a*handle_f(a)
   end
   result=myfun2(@(aa)myfun1(aa),a);

Well, this works perfectly fine. Now let say that I want to decide to vary the number of and type of arguments of myfun1 or use completely different function. How should I write myfun2 to be able to work with any type of function with different number of input arguments and of course same output type?

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Answer 1

Andrei Bobrov 2012-4-20

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/36051-passing-function-handle-to-another-function-and-assigning-varying-number-of-input-arguments-to-it#answer_45112

在 MATLAB Online 中打开

please read about varargin, nargin and varargout, nargout

eg

function b=myfun2(handle_f,varargin)
   a = varargin{1};
   b=a.*handle_f(varargin{:})
end

on Hossein's comment

myfun2(@(x)myfun3(x,y),a); %here y is defined
myfun2(@(y)myfun3(x,y),a); %here x is defined
myfun2(@(x,y)myfun3(x,y),a,y);
myfun2(@(y,x)myfun3(x,y),a,x);