updating function list in a script.

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David H 2014-8-26

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https://ww2.mathworks.cn/matlabcentral/answers/152415-updating-function-list-in-a-script

编辑： David H 2014-8-27

As part of some code I am writing I am printing out symbolic variables into a .m file (so that they can be called with d.p. arguments without using the incredibly sluggish subs). This works well except that when I create a new function matlab does not automatically note that the function has changed and will either not notice the function is present, complain about the arguments of the function, or use an old overwritten version.

Is there any command to update the list of possible functions (within the same working directory) or any other way to solve this problem?

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Star Strider 2014-8-26

I don’t know how you’re creating your funcitons, but starting with R2012a, you can create symbolic functions. You can also create anonymous functions or function m-files from symbolic expressions with matlabFunction. That might make things easier in your application.

David H 2014-8-27

编辑：David H 2014-8-27

Yes I was unaware of this, it seems to be much easier to work with than the function I wrote which just copies it as characters, and so doesn't work for matrix inputs and things like that.

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Answer 1

dpb 2014-8-26

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/152415-updating-function-list-in-a-script#answer_149884

在 MATLAB Online 中打开

>> help rehash
rehash  Refresh function and file system caches.
  rehash with no inputs performs the same refresh operations that are done
  each time the MATLAB prompt is displayed--namely, for any non-toolbox
  directories on the path, the list of known files is updated, the list of
  known classes is revised, and the timestamps of loaded functions are
  checked against the files on disk.  The only time one should need to use
  this form is when writing out files programmatically and expecting
  MATLAB to find them before reaching the next MATLAB prompt.

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Sean de Wolski 2014-8-26

This is also mentioned in the "Tips" section of the doc for matlabFunction.

An enhancement request proudly submitted by me :)

David H 2014-8-27

I find that rehash does not completely work for me, but matlabFunction seems to solve my problems anyway with the options available. So that will be fine.

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