how to remove lines with variable value
 

Hi frds,

I have model output data in ascii format. It contains thousands of lines. The output file contains multiple text lines with variable values. here I copy-paste some of it's contents.



and so on


i want to remove the lines starting by WRT and DEF.
so how can do it..please help.

Thanking you

Mahesh

Welcome to LinuxQuestions! Are you running ROMS? ;)
Add option -i if you want to edit the file in place, otherwise redirect standard output to a new file.

Thanks for the reply. Yes I am running ROMS model.

mahesh

If you have Perl installed

#!/usr/bin/perl
use warnings;

open ( IH, '<', './path_to _your_file') or die "$!\n";
open ( OH, '>', './your_output_filename') or die "$!\n";

while (<IH>) {
next if /^DEF/;
next if /^WRT/;
print OH;
}
__END__

No it's not working......................

What is not working? And what is not working means? Actually in the ROMS log the DEF_ and WRT_ keywords are not written at the beginning of the line, hence the sed command should be simply:
without the ^ anchor that identifies the beginning of the line.

PS: I've edited your post adding CODE tags to preserve the spacing of the original text, so that it's more evident where the problem comes from.

Not being familiar with ROMS logs, are we sure that DEF_ and WRT_ won't appear anywhere else in the line?
If they might you can cover white space with:

Yes! :) Anyway, your improvement is absolutely correct! :jawa: