Clear Filters
Clear Filters

"Input parser" vs. new "arguments" definition

31 views (last 30 days)
Stefan Sp.
Stefan Sp. on 17 Jan 2022
Edited: Stephen23 on 26 Jun 2023
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 Comment
chicken vector
chicken vector on 7 Apr 2023
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.

Sign in to comment.

Answers (1)

埃博拉酱
埃博拉酱 on 7 Apr 2023
Edited: 埃博拉酱 on 7 Apr 2023
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.
  4 Comments
Simon
Simon on 26 Jun 2023
I have the same question. Both inputParser and arguments are unfamiliar to me.
Stephen23
Stephen23 on 26 Jun 2023
Edited: Stephen23 on 26 Jun 2023
@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{:})
** with cell arrays. AFAIK comma-separated lists were introduced at the same time.

Sign in to comment.

Categories

Find more on Argument Definitions in Help Center and File Exchange

Products


Release

R2019b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!