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Full Discussion: Awk: adding fields after matching $1
Top Forums Shell Programming and Scripting Awk: adding fields after matching $1 Post 302870417 by kben on Sunday 3rd of November 2013 01:36:19 PM
Old 11-03-2013
Awk: adding fields after matching $1
Dear AWK-experts!

I did get stuck in the task of combining files after matching fields, so I'm still awkward with learning AWK.

There are 2 files: one containing 3 columns with ID, coding status, and score for long noncoding RNAs:

file1 (1.txt) (>5000 lines)

Code:
TCONS_00017358;noncoding;0.968717
TCONS_00024657;noncoding;0.995485
TCONS_00005907;noncoding;0.808883 
TCONS_00013445;noncoding;0.998353 
TCONS_00001277;noncoding;0.934182 
TCONS_00047071;noncoding;0.919281 
TCONS_00040152;noncoding;0.988357

The second file contains the same ID ($1 == $1) and a corresponding Gene name in field $2:

file2 (2.txt)
Code:
TCONS_00024657;KCNC2 
TCONS_00005907;CDH11 
TCONS_00013445;TAF12 
TCONS_00047071;MYO19 
TCONS_00040152;KCNC2 
TCONS_00017358;PAIP1 
TCONS_00001277;CHAD4

I would like to add the Gene name ($2 from file2) as an additional column to file1 in a newly generated file3. Every Gene name is located somewhere in file2. Because of asymmetric distributed duplicates in file2 a simple sort after ID and cat doesn't work. At the moment I'm trying.

Code:
awk -F ";" > 3.txt 'NR == FNR {   
               _[$1] = $1; _[$2] = $2   
               next 
               } 
                  if (_[$1] == $1)  {   
                  print $0, _[$2]   
              }' 2.txt 1.txt

Any help would be awesome!!!
 

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LEARN ABOUT DEBIAN

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).

Free Software Foundation					    Nov 3 1999								  IGAWK(1)
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