Passing name-value arguments to a function that calls feval

Question

Alex Alex 2022-4-13

1
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1695945-passing-name-value-arguments-to-a-function-that-calls-feval

评论： Voss 2022-4-14

Hello,

Is it possible to pass name-value arguments to a function that calls feval? If yes, what is the syntax? The problem looks like this:

% I want to pass any number of name-value pairs here
r = frun(@fA,argA1=2)
% ========================================================================
function r = frun(fh,varargin)
% Function that calls feval
r = feval(fh,varargin);
end
% ========================================================================
function resA = fA(namedArgs)
% Test function A
arguments
    namedArgs.argA1 (1,1) double = 1
    namedArgs.argA2 (1,1) double = 1
    namedArgs.argA3 (1,1) double = 1
end
resA = namedArgs.argA1 + namedArgs.argA2 + namedArgs.argA3;
end

Thanks

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Answer 1

Voss 2022-4-14

2
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1695945-passing-name-value-arguments-to-a-function-that-calls-feval#answer_942375

在 MATLAB Online 中打开

Use varargin{:} to send the contents of varargin to the feval function as a comma-separated list of arguments.

% I want to pass any number of name-value pairs here
r = frun(@fA,argA1=2)
r = 4
% ========================================================================
function r = frun(fh,varargin)
% Function that calls feval
r = feval(fh,varargin{:});
end
% ========================================================================
function resA = fA(namedArgs)
% Test function A
arguments
    namedArgs.argA1 (1,1) double = 1
    namedArgs.argA2 (1,1) double = 1
    namedArgs.argA3 (1,1) double = 1
end
resA = namedArgs.argA1 + namedArgs.argA2 + namedArgs.argA3;
end