topic Re: Removing constant pattern and whitespaces. in Operating System - HP-UX

Removing constant pattern and whitespaces.

Chern Jian Leaw — Mon, 08 Jul 2002 07:21:24 GMT

HI,

I would like to remove every instance of the following pattern:
.output
=============

from the file attached. This pattern is a subset of the pattern:
pglc0003.output
=============

As there are whitespaces separating each entries, how do I write a script to eliminate those whitespaces and at the same time remove the mentioned pattern?

Thanks.

Re: Removing constant pattern and whitespaces.

Steve Steel — Mon, 08 Jul 2002 07:32:17 GMT

Hi

cat file|while read line
do
echo |sed -e 's/.output//'|grep -v "======="
done|strings > newfile

Steve Steel

Re: Removing constant pattern and whitespaces.

Karvendhan M — Mon, 08 Jul 2002 08:02:07 GMT

I hope You have more than one file to process.

This small script will help you.

...............................
#!/usr/contrib/bin/perl -w

while(){

s/^\s*$//;
s/\.output//;
print;

}

...............................

run this script as $ cat text_file | script
or
$ script < text file.

HTH,

Karvendhan M

Re: Removing constant pattern and whitespaces.

Karvendhan M — Mon, 08 Jul 2002 08:18:46 GMT

Sorry ,

I missed the === .. pattern.

the script can be
----------------------------------

#!/usr/contrib/bin/perl -w
while(){
s/^\s*$//; # remove blank lines.
s/^\=+\s*$//; # Remove === ..
s/\.output//; # Remove .output.
s/^\s+//; # remove leading space in lines.
print;
}

------------------------

~ Karvendhan M.

Re: Removing constant pattern and whitespaces.

Leif Halvarsson_2 — Mon, 08 Jul 2002 08:30:12 GMT

# to remove .output :
while read $a
basename $a .output
done tmpfile1

# to remove ================

cat tmpfile1 |tr -s "=" >tmpfile2

# to remove whitespaces

cat tmpfile2 |tr -s " " >tmpfile3

Re: Removing constant pattern and whitespaces.

Leif Halvarsson_2 — Mon, 08 Jul 2002 08:32:52 GMT

Sorry

I forgot "do".

While read $a do

Re: Removing constant pattern and whitespaces.

Chern Jian Leaw — Mon, 08 Jul 2002 08:34:23 GMT

Steve,
I tried running your code exactly as you've shown me:

cat filename|while read line
do
echo |sed -e 's/.output//'|grep -v "====="
done|strings > newfile.txt

However, the file "newfile" does not contain any outputs.

Could you help me out?

Thanks.

Re: Removing constant pattern and whitespaces.

Karvendhan M — Mon, 08 Jul 2002 08:37:53 GMT

hi

Steve's script should be....

echo $line |sed -e 's/ .....

HTH,

Karvendhan M

Re: Removing constant pattern and whitespaces.

Chern Jian Leaw — Mon, 08 Jul 2002 08:57:39 GMT

Steve,

the line sed -e 's/.output//'|grep -v "===="
should remove the .output pattern followin the patterns pglc.., right?

Unfortunately, it's printing :
pglc0002.output
....

for all of its output.

Could you please help me out?

Thanks.

Re: Removing constant pattern and whitespaces.

Procnus — Tue, 09 Jul 2002 01:13:57 GMT

if you want the output to be :
pglc0000
pglc0001
etc.

I'd tend to use:
grep '[a-zA-Z]' | cut -f1 -d. > output.txt

I can think of other ways using sed etc. but this would be quicker

Cheers
Steven

Re: Removing constant pattern and whitespaces.

Mark Ellzey — Tue, 09 Jul 2002 14:24:37 GMT

Chern,

Try Steve's script again, just modify the > newfile.txt to >> newfile.txt

ME

Re: Removing constant pattern and whitespaces.

Procnus — Tue, 09 Jul 2002 20:11:10 GMT

oops, forgot something...
if you want the output to be :
pglc0000
pglc0001
etc.

I'd tend to use:
grep '[a-zA-Z]' | cut -f1 -d. > output.txt

I can think of other ways using sed etc. but this would be quicker

Cheers
Steven

Re: Removing constant pattern and whitespaces.

Dave Chamberlin — Tue, 09 Jul 2002 21:15:40 GMT

I am assumming you want to get output like:
pglc0003
pglc0004
pglc0005

etc.

Use:
cat yourfile | grep output | sed s/\.output//g > newfile