How to merge multiple rows into single row if first column matches ?

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# 1  
How to merge multiple rows into single row if first column matches ?


Can anyone suggest quick way to get desired output?

Sample input file content:
A  12 9
A  -0.3 2.3
B  1.0 -4
C  34 1000
C  -111 900
C  99 0.09

Output required:
A 12 9 -0.3 2.3
B 1.0 -4
C 34 1000 -111 900 99 0.09


Last edited by Franklin52; 05-29-2012 at 04:24 AM.. Reason: Please use code tags
# 2  
How about this ?
sort Filename | awk '{if(a!=$1) {a=$1; printf "\n%s%s",$0,FS} else {a=$1;$1="";printf $0 }} END {printf "\n" }'

# 3  
# 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 09:19 AM.. Reason: code modify
# 4  
With a sorted input file:
awk '$1!=p{if(p)print s; p=$1; s=$0; next}{sub(p,x); s=s $0} END{print s}' infile

unsorted input file:
awk '{k=$1=$1; sub(k,x); A[k]=A[k] $0} END{for(i in A)print i A[i]}' infile

Last edited by Scrutinizer; 05-29-2012 at 06:02 AM..
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