Help to avoid the eval() function

Question

Yunhui Zhou 2016-11-5

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编辑： John D'Errico 2016-11-5

I currently have problem using the feval() function to replace the eval() function.

The user will input a string array "function_name", which is the name of the function_name.m file; and a cell array "varargin", in which each cell is an input argument for the function_name.m file. The number of cells in "varargin" can't be determined.

Currently I'm using a for-loop to generate a string "function_name(varargin{1},varargin{2},...)", and then using the eval() function to execute the string, and it works. However, I wish to replace the eval() function with feval() function, but it seems hard to transfer all the input arguments. Is it possible to do the replacement?

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Answer 1

KSSV 2016-11-5

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See this link it may be help full:

http://in.mathworks.com/matlabcentral/answers/310275-execute-a-list-of-functions

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Answer 2

Guillaume 2016-11-5

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在 MATLAB Online 中打开

feval(function_name, varargin{:})

Will call the function with however many arguments are stored in varargin.

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Answer 3

John D'Errico 2016-11-5

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编辑：John D'Errico 2016-11-5

在 MATLAB Online 中打开

Easy, peasy:

y = feval(fun,varargin{:});

The {:} makes a cell array (i.e., varargin) into what is called a comma separated list,exactly what feval needs. This is how you expand a cell array into an argument list.