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Full Discussion: Compare and matching column entries in 2 files and
Top Forums Shell Programming and Scripting Compare and matching column entries in 2 files and Post 302888503 by Scrutinizer on Friday 14th of February 2014 03:30:48 PM
Old 02-14-2014
@kieranfoley. There seem to be some contradictions between your input and output files and your description. Although the solutions given apparently "work perfectly", could you please clarify what you mean, so this thread becomes more comprehensible?
  • Is the input file TAB-separated or space-separated?
  • The second input file seems to contain 5 columns, not 4
  • The order of the fields seems to be fields 1,2,3,4 from file1, field 5 from file 2 and the rest from file 1 again?

--edit--
If point 2 and 3 are so, then this would also produce that output:
Code:
awk '{i=$1 FS $2 FS $3} NR==FNR{A[i]=$5; next} i in A{$5=A[i]}1' file1 file2

Last edited by Scrutinizer; 02-14-2014 at 04:39 PM..
 

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LEARN ABOUT MINIX

paste

PASTE(1)						      General Commands Manual							  PASTE(1)

NAME

       paste - paste multiple files together

SYNOPSIS

       paste [-s] [-d list] file...

OPTIONS

       -d     Set delimiter used to separate columns to list.

       -s     Print files sequentially, file k on line k.

EXAMPLES

       paste file1 file2   # Print file1 in col 1, file2 in col 2

       paste -s f1 f2	   # Print f1 on line 1 and f2 on line 2

       paste -d : file1 file2
			   # Print the lines separated by a colon

DESCRIPTION

       Paste  concatenates  corresponding  lines of the given input files and writes them to standard output. The lines of the different files are
       separated by the delimiters given with the option -s. If no list is given, a tab is substituted for every linefeed, except  the	last  one.
       If  end-of-file	is hit on an input file, subsequent lines are empty.  Suppose a set of k files each has one word per line.  Then the paste
       output will have k columns, with the contents of file j in column j.  If the -s flag is given, then the first file is on line 1, the second
       file on line 2, etc.  In effect, -s turns the output sideways.

       If  a list of delimiters is given, they are used in turn.  The C escape sequences 
, 	, \, and  are used for linefeed, tab, backslash,
       and the null string, respectively.

																	  PASTE(1)
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