Swapping Letters Using Regular Expression

Question

Michael Cappello 2019-7-12

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/471472-swapping-letters-using-regular-expression

评论： Michael Cappello 2019-7-12

采纳的回答： Guillaume

I want to take a character array, find the first vowel and move it to the end. Some examples

'Fred' --> 'Frde'
'Replace' --> 'Rplacee'
'Cannot' --> 'Cnnota'

Is there a regular expression that will accomplish this with a single call to regexp?

Thank you

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Stephen23 2019-7-12

编辑：Stephen23 2019-7-12

"Is there a regular expression that will accomplish this with a single call to regexp?"

There is likely no simple regular expression that will reliably detect the first vowel of every word in the entire English corpus, due to some letters which indicate vowels in some words and consonants in others (particularly w, u, and y).

Like most categorizations, it gets very blurred once you start looking in detail...

What is the first vowel of 'Queen' ?

What about 'Year' ?

Cwm ?

Gym ?

Sydney ?

Ytterbium ?

But not Yesterday...

Michael Cappello 2019-7-12

Agreed. But the problem statement was just an example that would help me understand the regular expression syntax.

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Answer 1

Guillaume 2019-7-12

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/471472-swapping-letters-using-regular-expression#answer_382997

编辑：Guillaume 2019-7-12

在 MATLAB Online 中打开

>> text = {'Fred', 'Replace', 'Cannot'};
>> regexprep(text, '([^aeiou]*)([aeiou])(.*)', '$1$3$2')
ans =
  1×3 cell array
    {'Frde'}    {'Rplacee'}    {'Cnnota'}