regex - regular expression in matlab to match decimal in filename -

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i'm trying match int or decimal in matlab using regular expressions

i have: kabel_2.5cm_proef2.xls , want match 2.5

another example: kabel_5cm_proef1.xls want match 5

any ideas?

to match int or floating point numbers present before string cm

\d+(?:\.\d+)?(?=cm)

demo

(?=cm) positive lookahead asserts match must followed cm


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