How to call functions indirectly?

Question

Bernard Küsel 2012-5-25

1
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/39409-how-to-call-functions-indirectly

Hi,

I would like to know how to call functions indirectly. For example: lets supose I have a data vector X, the functions F1.m, F2.m and F3.m (which input is the variable X) and I put these functions names in a list:

X=rand(1,100);
Myfuns={'F1','F2','F3'};

What I do today is something like:

Y(1)=F1(X);
Y(2)=F2(X);
Y(3)=F3(X);

What I would like to do is to call these functions using the variable Myfuns. Something like

for i=1:length(Myfuns)
     Y(i)=Myfuns{i}(X);
end

Of course this doesn't work, but is there a way to do something this?

Thank you,

Bernard.

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Answer 1

Daniel Shub 2012-5-25

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/39409-how-to-call-functions-indirectly#answer_49019

在 MATLAB Online 中打开

You can do it with only additions to your code

F1 = @(a)length(a);
F2 = @(b)sum(b);
F3 = @(c)min(c);
X=rand(1,100);
Myfuns={'F1','F2','F3'};
for ii = 1:length(Myfuns)
  eval(['Myfuns{ii} = @(x)', Myfuns{ii}, '(x)']);
end
for i=1:length(Myfuns)
     Y(i)=Myfuns{i}(X);
end