Reuse parts of the matching expression as replace string

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!

Answer 1

[Sean de Wolski]

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 :)

[Léon]

Hey thx! :)

[Adam Danz]

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.