why vectorize function is not recommended?

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Osama Alkurdi 2021-1-28

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https://ww2.mathworks.cn/matlabcentral/answers/729138-why-vectorize-function-is-not-recommended

编辑： Stephen23 2021-3-27

can anyone explain to me in a simple way why vectorize function is not recommended, and how i can avoid any possible troubles from using it

and is there is a better way to do its functionality, please dont give me links, just explain to me in a simple way, thanks in advance.

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Walter Roberson 2021-1-28

在 MATLAB Online 中打开

Also, long standing bug: vectorize changes quoted strings.

vectorize("ismember(A, {'+', '-', '*', '/', '^', '\'})")
ans = 'ismember(A, {'+', '-', '.*', './', '.^', '\'})'

Stephen23 2021-1-29

编辑：Stephen23 2021-3-27

在 MATLAB Online 中打开

"You missed one, Stephen, but it is quite obscure. The \ operator is vectorized as .\ also known as ldivide; "

No, as your own example clearly shows, the vectorize operator does not change that operator:

vectorize('a\b')
ans = 'a\b'

You missed looking at the output of your own example (above), which clearly shows that vectorize does NOT add a period in front of the backslash character.

You missed reading my previous comment, Walter Roberson, where I hinted that I had already looked at the code. And where I stated that that vectorize could be "trivially replaced with one regexprep call".

I did not "miss" that operator, because what I wrote replicates the behavior of vectorize.

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回答（1 个）

Catalytic 2021-1-29

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https://ww2.mathworks.cn/matlabcentral/answers/729138-why-vectorize-function-is-not-recommended#answer_609018

A warning without an explanation is not a real warning. I say you just ignore it.

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Matt J 2021-1-29

If no explanation implies the reason doesn't exist then, by the same logic, no explanation for the omission means the omission doesn't exist. So if the omission doesn't exist, maybe TMW feels than explanation was indeed given! :-)

Adam Danz 2021-1-29

编辑：Adam Danz 2021-1-29

Scroll to the bottom of the vectorize page and place a star rating which will allow you to type and submit feedback.

That feedback is received by MathWorks Gnomes which are never seen nor heard but visit the MathWorks documentation team at night while they are sleeping and whisper selected suggestions into their ears to manipulate their dreams. Occassionally this causes them to wake up with a Eureka moment that leads to changes in the documentation.

https://www.mathworks.com/help/matlab/ref/vectorize.html