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Full Discussion: Need awk to extract lines and sort
Top Forums Shell Programming and Scripting Need awk to extract lines and sort Post 302360864 by durden_tyler on Sunday 11th of October 2009 01:23:24 AM
Old 10-11-2009
Quote:
Originally Posted by genehunter
...
What I tried:
Code:
gawk '{if(NR>1 && $5="ADD") {print $0}}' infile>outfile

Everything in col5 is changed to ALL. Smilie
That's because you assigned the value "ADD" to the fifth field ($5). You will have to compare the fifth field ($5) with "ADD" instead.

=> Operator for assignment is "=". It changes the value.
=> Operator for comparison is "==". It doesn't change the value.

Code:
$
$ cat f1
 CHR                           SNP         BP   A1       TEST    NMISS         OR         STAT            P
   0                 SNP_A-8282315          0    2        ADD     1530      1.074       0.7707       0.4409
   0                 SNP_A-8282315          0    2       COV1     1530  1.771e+04        4.764    1.898e-06
   0                 SNP_A-8282315          0    2       COV2     1530  1.513e+04        4.645    3.402e-06
   0                 SNP_A-8282315          0    2       COV3     1530      14.16        1.306       0.1915
   0                 SNP_A-8282315          0    2       COV4     1530      1.264       0.1139       0.9093
   0                 SNP_A-8282315          0    2       COV5     1530      2.389       0.4268       0.6695
   0                 SNP_A-8338258          0    4        ADD     1528     0.9498      -0.6824        0.495
   0                 SNP_A-8338258          0    4       COV1     1528  1.846e+04        4.777    1.783e-06
   0                 SNP_A-8338258          0    4       COV2     1528  1.374e+04          4.6    4.224e-06
   0                 SNP_A-8338258          0    4       COV3     1528      14.82         1.33       0.1836
   0                 SNP_A-8338258          0    4       COV4     1528      1.251       0.1087       0.9134
   0                 SNP_A-8338258          0    4       COV5     1528      2.431       0.4354       0.6633
$
$ gawk '{if(NR>1 && $5=="ADD") {print $0}}' f1
   0                 SNP_A-8282315          0    2        ADD     1530      1.074       0.7707       0.4409
   0                 SNP_A-8338258          0    4        ADD     1528     0.9498      -0.6824        0.495
$
$

Rookie programmer mistake. Smilie

In fact, since printing the line is the default action of awk and its variants, you could slim down your one-liner to:

Code:
gawk '$5=="ADD"' <filename>

tyler_durden
 

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LEARN ABOUT DEBIAN

postfix-add-policy

POSTFIX-ADD-POLICY(8)					      System Manager's Manual					     POSTFIX-ADD-POLICY(8)

NAME

       postfix-add-policy - add policy service to Postfix master.cf

SYNOPSIS

       postfix-add-policy [policy name...] [username...] [argv...]

DESCRIPTION

       The  postfix-add-policy(8)  command  adds  an  smtp  policy server named policy name running using username and called as argv to etc/post-
       fix/master.cf to facilitate integration of SMTP policy servers such as postgrey or postfix-policyd-spf-perl.  The configuration is based on
       the Postfix SMTPD_POLICY_README.  Adminstrators should verify it is appropriate for their requirements.

       The original file is copied prior to modification and left in /etc/postfix to make it possible to revert changes easily.

       Available in the Debian package for Postfix version 2.5.3 and later.

DIAGNOSTICS

       If the given policy name  already appears in the master.cf, a message will be printed to standard out and master.cf will not be modified.

ENVIRONMENT

       MAIL_CONFIG
	      Directory with Postfix configuration files.

	      The  postfix-add-policy(8)  command  should  use	this, but it currently doesn't.  It is hard coded to /etc/postfix.  This should be
	      changed.

CONFIGURATION PARAMETERS

       None

FILES

       /etc/postfix/master.cf

SEE ALSO

       postconf(5), Postfix configuration

LICENSE

       This software is licensed under the MIT open source license.

AUTHOR(S)
       Scott Kitterman
       <scott@kitterman.com>

															     POSTFIX-ADD-POLICY(8)
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