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Top Forums Shell Programming and Scripting How to merge multiple rows into single row if first column matches ? Post 302647851 by ygemici on Tuesday 29th of May 2012 03:22:47 AM
Old 05-29-2012
Code:
# awk '{a[x++]=$0;b[xx++]=substr($0,1,1)}END{for(i=0;i<x;i++)if(b[i]==b[i+1]){f=f?f a[i+1]:f a[i]a[i+1]}else{if(f=="")f=a[i];gsub(b[i]" ","",f);
print b[i] f;f=""}}' file
A 12 9 -0.3 2.3
B 1.0 -4
C 34 1000 -111 900 99 0.09


Last edited by ygemici; 05-29-2012 at 08:19 AM.. Reason: code modify
 

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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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