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"Input parser" vs. new "arguments" definition

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Stefan Sp.
Stefan Sp. 2022-1-17
编辑： Stephen23 2023-6-26
R2019b introduced the new "arguments" section for function argument checking and parsing.
I hahe written some functions using the "old" input parser class. Are there any advantages to switch to the new syntax?
Is it worth to update my functions to the new syntax? (sure, I know, "never change a running system")
regards, Stefan
  1 个评论
chicken vector
chicken vector 2023-4-7
Hi Stefan, this is a question of great interest.
Have you figured out an answer yet? I am implementing a library and I can't choose what to use.

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回答（1 个）

埃博拉酱
埃博拉酱 2023-4-7
编辑：埃博拉酱 2023-4-7
The biggest advantage of the arguments block is readability, but it is far less flexible than varargin. People who are not familiar with your code can quickly understand your parameter requirements through the arguments block.
Another potential advantage may be ease of compiler optimization. Overly flexible varargin is difficult to optimize for performance.
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Simon
Simon 2023-6-26
I have the same question. Both inputParser and arguments are unfamiliar to me.
Stephen23
Stephen23 2023-6-26
编辑：Stephen23 2023-6-26
@chicken vector: you can always use a comma-separated list, which works on every MATLAB version**:
options = {"parameters1", 1, "parameter2", 'foo', "parameter3", true}
myfunction(requiredInput, options{:})
https://www.mathworks.com/help/matlab/matlab_prog/comma-separated-lists.html
https://www.mathworks.com/matlabcentral/answers/1656435-tutorial-comma-separated-lists-and-how-to-use-them
** with cell arrays. AFAIK comma-separated lists were introduced at the same time.

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