(e)grep "remove lines with only numbers"

(e)grep "remove lines with only numbers"

[lists]

HOwdy --

This is seem like it should be a simple task for grep.
I have a file that looks like this:



\section{Chapter 1}

          1
One fish    two fish
2                  3

Red fish blue fish


What I want to do i remove the line that have numbers on them and nothing else?


TIA,
David

Re: (e)grep "remove lines with only numbers"

[zavandi]

lists@lastisfirst.com wrote:
> This is seem like it should be a simple task for grep.
> I have a file that looks like this:
> 
> 
> 
> \section{Chapter 1}
> 
>           1
> One fish    two fish
> 2                  3
> 
> Red fish blue fish
> 
> 
> What I want to do i remove the line that have numbers on them and nothing else?

Maybe something like:

egrep -v '^[0-9 ]*[0-9][0-9 ]*$'

?

Re: (e)grep "remove lines with only numbers"

[A. R. Vener]

Try:
grep -v "^[0-9]*$" file > newfile


> > This is seem like it should be a simple task for grep.
> > I have a file that looks like this:
> > 
> > 
> > 
> > \section{Chapter 1}
> > 
> >           1
> > One fish    two fish
> > 2                  3
> > 
> > Red fish blue fish
> > 
> > 
> > What I want to do i remove the line that have numbers on them and nothing else?

Rudy Vener

Re: (e)grep "remove lines with only numbers"

[M. B. Heath]

On Thu, 8 Jul 2004 lists@lastisfirst.com wrote:

> HOwdy --
> 
> This is seem like it should be a simple task for grep.
> I have a file that looks like this:
> 
> \section{Chapter 1}
> 
>           1
> One fish    two fish
> 2                  3
> 
> Red fish blue fish
> 
> 
> What I want to do i remove the line that have numbers on them and 
> nothing else?

Assuming that you mean you want to remove the lines that have only numbers 
on them, and leave the line that has both numbers and letters, something 
like this should work...

egrep -v '^[0-9 ][0-9 ]*$' 

In other words, match lines beginning with a number or space, followed by 
0 or more numbers or spaces.

This will leave the line with "Chapter 1" in it.  If you waant to remove 
that too, then all you would need is 

egrep -v '[0-9]'

I would strongly recommend getting a copy of "Mastering Regular 
Expressions" by Jeffrey E. F. Fredl, and/or checking out 
http://sitescooper.org/tao_regexps.html if you want a really good workout 
in regular expression creation.

Malcolm

Re: (e)grep "remove lines with only numbers"

[zavandi]

M. B. Heath wrote:
> egrep -v '^[0-9 ][0-9 ]*$' 

Maybe, but that would also remove the lines containing only spaces...

Re: (e)grep "remove lines with only numbers"

[Malcolm Heath]

This was a quickly thrown together expression to deal with the input 
the poster had specified, which didn't have any lines of only spaces.

But you definitely have a point.  The one you posted is much better 
than mine.

Malcolm

On Jul 8, 2004, at 8:24 AM, zavandi wrote:

> M. B. Heath wrote:
>> egrep -v '^[0-9 ][0-9 ]*$'
>
> Maybe, but that would also remove the lines containing only spaces...
>

Re: (e)grep "remove lines with only numbers"

[lists]

Quoting Malcolm Heath <malcolm@indeterminate.net>:

> This was a quickly thrown together expression to deal with the input
> the poster had specified, which didn't have any lines of only spaces.
>
That's to all of you for you suggestions.It did the trick.

Malcolm,
Thanks for the link to the regrex tutorial, I have a look at it.
The book your referring to is from O'Reilly, I actually had that at one point a
couple of years ago.


Thanks again,
David