AWK - awk question

Author

awk question

Jawad H

2004-05-20, 2:30 pm

I am in the process of writing a script that would read input from a
file containing 2 columns and would screen out and list only the
columns that contain "0". e.g,.

col 1 col 2
3333 542
4321 0
5541 0
5555 432

so I would want

col 1 col 2
4321 0
5541 0

I am new to programing and would very much like input to get the
results: The script looke like
awk /^[0]$/ '{ print $1, $2 }' file > file1 2>&1

obviously the above is not working
Thanks

Charles Demas

2004-05-20, 3:30 pm

In article <54078e50.0405200915.21fa7a4e@posting.google.com>,
Jawad H <jawadhus@lycos.com> wrote:
>I am in the process of writing a script that would read input from a
>file containing 2 columns and would screen out and list only the
>columns that contain "0". e.g,.
>
>col 1 col 2
>3333 542
>4321 0
>5541 0
>5555 432
>
>so I would want
>
>col 1 col 2
>4321 0
>5541 0
>
>I am new to programing and would very much like input to get the
>results: The script looke like
>awk /^[0]$/ '{ print $1, $2 }' file > file1 2>&1
>
>obviously the above is not working
>Thanks

awk '$1==0 || $2==0' infile > outfile

Chuck Demas

--
Eat Healthy | _ _ | Nothing would be done at all,
Stay Fit | @ @ | If a man waited to do it so well,
Die Anyway | v | That no one could find fault with it.
demas@theworld.com | \___/ | http://world.std.com/~cpd

Ed Morton

2004-05-20, 4:30 pm

Jawad H wrote:
> I am in the process of writing a script that would read input from a
> file containing 2 columns and would screen out and list only the
> columns that contain "0". e.g,.

Yes, I know. You posted this question and got an answer 3 hours ago on
comp.unix.shell.

Ed.

Martin Neitzel

2004-05-21, 12:30 pm

Jawad H <jawadhus@lycos.com> wrote:
>I am in the process of writing a script that would read input from a
>file containing 2 columns and would screen out and list only the
>columns that contain "0". e.g,.
>
>col 1 col 2
>3333 542
>4321 0
>5541 0
>5555 432

awk '! $1*$2'

will do the job and even preserve your header.

Martin Neitzel

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