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Full Discussion: Awk- Indexing a list of numbers in file2 to print certain rows in file1
Top Forums Shell Programming and Scripting Awk- Indexing a list of numbers in file2 to print certain rows in file1 Post 303025315 by vgersh99 on Tuesday 30th of October 2018 01:22:19 PM
Old 10-30-2018
something along these lines:
default 2 lines before/after
awk -f gene.awk file2.txt file1.txt
or 30 lines before/after
awk -v ba=30 -f gene.awk file2.txt file1.txt
where gene.awk is:
Code:
BEGIN {
  if(!ba) ba=2
}
FNR == NR {
   f2[$1];
   next
}
{
  f1all[FNR]=$0
  if ($3 in f2) {
    f1pat[$3]=FNR
    f1order[++order]=$3
  }
}
END {
  for (i=1;i<=order;i++)
    for(j=f1pat[f1order[i]]-ba;j<=f1pat[f1order[i]]+ba;j++)
      print f1all[j]
}

Or depending on your OS/version of grep you could do (for 2 lines before/after):
grep -A 2 -B 2 -F -f file2.txt file1.txt
Last edited by vgersh99; 10-30-2018 at 03:19 PM..
This User Gave Thanks to vgersh99 For This Post:
Geneanalyst
 

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LEARN ABOUT OPENSOLARIS

igawk

IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME

       igawk - gawk with include files

SYNOPSIS

       igawk [ all gawk options ] -f program-file [ -- ] file ...
       igawk [ all gawk options ] [ -- ] program-text file ...

DESCRIPTION

       Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1).

       AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like

	      @include getopt.awk

       in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path.

OPTIONS

       See gawk(1) for a full description of the AWK language and the options that gawk supports.

EXAMPLES

       cat << EOF > test.awk
       @include getopt.awk

       BEGIN {
	    while (getopt(ARGC, ARGV, "am:q") != -1)
		 ...
       }
       EOF

       igawk -f test.awk

SEE ALSO

       gawk(1)

       Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995.

AUTHOR

       Arnold Robbins (arnold@skeeve.com).

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +--------------------+-----------------+
       |  ATTRIBUTE TYPE    | ATTRIBUTE VALUE |
       +--------------------+-----------------+
       |Availability	    | SUNWgawk	      |
       +--------------------+-----------------+
       |Interface Stability | Volatile	      |
       +--------------------+-----------------+
NOTES

       Source for gawk is available on http://opensolaris.org.

Free Software Foundation					    Nov 3 1999								  IGAWK(1)
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