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extract_numeric returns positive on negative numbers #20

barryrowlingson opened this Issue Aug 14, 2014 · 1 comment


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barryrowlingson commented Aug 14, 2014

extract_numeric("-123") returns 123, because all it does is strip anything not 0-9 or decimal point.

Its documentation is pretty thin too.

discussion here:

@hadley hadley closed this in 633984d Aug 22, 2014


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gabx commented Apr 20, 2015

extract_numeric("23 ft-lbs")
[1] NA
Warning message:
In extract_numeric("23 ft-lbs") : NAs introduced by coercion
The minus sign in the regex is maybe good for "-123" but leads to errors too.

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