On Wed, 7 Apr 2004, Ronan Heffernan wrote:
> Levi Bard wrote:
>
> >>I need to rid a numeric file of all lines that contain non-numeric
> >>characters ie [0-9]. In other words I only want numbers in that file.
> >>I think I recall seeing a sed statement that deleted anything except
> >>0-9. I just don't recall the systax.
> >>I have tried the ! thinking it would do the trick but it does not.
> >>Can anyone help me with this?
> >>
> >>
> >
> >grep -v '[0-9]' file
> >
> >
> No, that will give all of the lines that do contain numbers (but the
> output will include the non-numeric characters. Try:
>
> sed "s/[^0-9]//g" filename
>
> --ronan
>
That will remove all non-numeric characters, but he said he wanted to
remove the line containing non-numeric characters.
This will send output to stdout:
sed "/[^0-9]/d" <filename>
To edit the file in place:
sed -i "/[^0-9]/d" <filename>
To remove the lines from the file and create a backup of the
original called filename.bak:
sed -i.bak "/[^0-9]/d" <filename>
-Daniel
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