You know if this only gets five lines,
grep -C 2ZZZ 1.vcf|wc - 1.vcf
5 5 197 -
16861731 83630 1.vcf
then this
grep -C 2 -v ZZZ 1.vcf|wc - 1.vcf
16861731 83630 -
16861731 83630 1.vcf
should get all EXCEPT five lines.
tag 26576 notabug
thanks
On 04/20/2017 09:39 AM, 積丹尼 Dan Jacobson wrote:
> You know if this only gets five lines,
> grep -C 2ZZZ 1.vcf|wc - 1.vcf
> 5 5 197 -
>16861731 83630 1.vcf
> then this
> grep -C 2 -v ZZZ 1.vcf|wc - 1.vcf
>16861731
Mmmm, OK, but grep still needs an additional future option to print just
the missing set...
On 04/20/2017 10:14 AM, 積丹尼 Dan Jacobson wrote:
> Mmmm, OK, but grep still needs an additional future option to print just
> the missing set...
What output are you wanting? If all you want is the non-matching lines,
don't ask for context (since the context will include matching lines).
If you wa
I want to do
$ cat file|some_program
but I must must exclude the UGLY line and its two neighbors.
OK I have found the UGLY line, and its two neighbors
$ grep -C 2 UGLY file
bla
bla
UGLY
bla
bla
but I have no way to exclude them before piping to some_program.
On 04/20/2017 10:37 AM, 積丹尼 Dan Jacobson wrote:
> I want to do
> $ cat file|some_program
> but I must must exclude the UGLY line and its two neighbors.
>
> OK I have found the UGLY line, and its two neighbors
> $ grep -C 2 UGLY file
> bla
> bla
> UGLY
> bla
> bla
>
> but I have no way to exclude
Yes, if somebody ever adds this option perhaps call it --compliment.
On 04/20/2017 11:38 AM, 積丹尼 Dan Jacobson wrote:
> Yes, if somebody ever adds this option perhaps call it --compliment.
Except that you mean --complement (you are not praising the lines, but
making an opposite selection of lines).
--
Eric Blake, Principal Software Engineer
Red Hat, Inc.
Hello,
On Thu, Apr 20, 2017 at 11:26:47AM -0500, Eric Blake wrote:
On 04/20/2017 10:37 AM, 積丹尼 Dan Jacobson wrote:
I want to do
$ cat file|some_program
but I must must exclude the UGLY line and its two neighbors.
OK I have found the UGLY line, and its two neighbors
$ grep -C 2 UGLY file
bla
bl
Yes those are brilliant uses of sed. However for now
‘-v’
‘--invert-match’
Invert the sense of matching, to select non-matching lines. (‘-v’
is specified by POSIX.)
perhaps should mention that "-v is processed before -C, -A, and -B, not after."
On 04/20/2017 11:51 AM, Assaf Gordon wrote:
> If I may suggest the following sed program:
>
> $ cat file
> a
> b
> c
> bla1
> bla2
> UGLY
> bla3
> bla4
> e
> f
> g
>
> $ sed -n ':x 1,2{N;bx} ; /UGLY/{ N;N;z;bx }; /./P;N;D' file
Works as long as lines 1 and 2 do not contain UGLY. Bu
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