Reuse parts of the matching expression as replace string

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Léon
Léon 2013-11-7
编辑： Adam Danz 2020-8-29
Hello,
I stuck in the usage of the regexprep() function and hope sb. can point me to the correct solution.
myarray = {'ABC 500mm';'DEF 3mm';'GHI 0.1mm'};
output = cellfun(@(myarray) regexprep(myarray,'\d*+mm','${regexp($0,''\d*'',''match'')}'),myarray, 'UniformOutput',false);
This 'solution' sadly produces an error as it states that the replacement string does not output a real string to use here. What I try to do is pretty simple - erase all occurrences of 'mm' when found after a number.
Many thanks!

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Sean de Wolski
Sean de Wolski 2013-11-7
编辑：Sean de Wolski 2013-11-7
myarray = {'ABC 500mm';'DEF 3mm';'GHI 0.1mm';'3mmm'};
regexprep(myarray,'(\d)mm','$1')
Explained:
capture a token () for any digit \d followed by mm. Replace whole expression with the token (i.e. the digit).
Also the regexp* family of functions can work on cellstr arrays :)
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Adam Danz
Adam Danz 2020-8-29
编辑：Adam Danz 2020-8-29
Nice explanation, Sean de Wolski!
Regular expressions are one of those things that you could use for years and learn something new every time you put one together.

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