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awk script to split field data

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# 1  
Old 07-21-2009
awk script to split field data
Hi Experts,

I have a Input.txt document which contains data fields seperated by tabs. There are 4 fields totally Named UNIQUE, ORDER, CONTACT and WINS. The UNIQUE field contains unique ID and the CONTACT field contains data seperated by comma in some records. I am looking to write an awk script which will split the CONTACT field values by comma and produce an output file with the split data and Unique ID as shown in the attachement. Any help is appreciated very much.

Many Thanks.

Input.txt
Code:
###########################################
UNIQUE	ORDER	CONTACT	WINS
G001	R01	SP,SD	solution
G002	R01A	B,DR,P	
G003	R02	AF	fix
G004	R03	PO,AC	build 
###########################################

Output.txt
Code:
###########################################
UNIQUE	CONTACT
G001	SP
G001	SD
G002	B
G002	DR
G002	P
G003	AF
G004	PO
G004	AC
###########################################

split.txt (404 Bytes) 
Last edited by zaxxon; 07-21-2009 at 12:10 PM.. Reason: printed attachment into post - easier to read
# 2  
Old 07-21-2009
Next time better use CODE-tags to enhance readability (the # in the editor window when writing a post) instead of attaching a file, ty.

Code:
$> awk '/^###/ {print} {split($3,arr,","); for(e in arr){print $1"\t"arr[e]} }' infile
###########################################
UNIQUE  CONTACT
G001    SP
G001    SD
G002    B
G002    DR
G002    P
G003    AF
G004    PO
G004    AC
###########################################

# 3  
Old 07-22-2009
Many thanks, your code works perfectly. I need some more help from you. when my CONTACT field values contain spaces between words then the code produces only the 1st value and ignores the rest of the field value. For example please see the 1st record.

If my input file is in the below format

Code:
UNIQUE	ORDER	CONTACT		WINS
G001	R01	Swr Pq,SD	solution
G002	R01A	B,DR,P	
G003	R02	A F		fix
G004	R03	PO,A C		build

then i want the output to be
Code:
UNIQUE	CONTACT
G001	Swr Pq
G001	SD
G002	B
G002	DR
G002	P
G003	A F
G004	PO
G004	A C

however i get the following output
Code:
UNIQUE	CONTACT
G001	Swr
G002	B
G002	DR
G002	P
G003	A
G004	PO

Any idea how I can correct it, that is to allow spaces between words.

Many Thanks again.
# 4  
Old 07-22-2009
Code:
awk 'NR==1{print $1"  "$3;next;} {n=split($3,arr,",");for(i=1;i<=n;i++){print $1" "arr[i];}}' yourfile

# 5  
Old 07-22-2009
Previous solutions spinup Smilie
Code:
awk '{n=split($3,arr,",");for(i=0;i++< n;){printf "%s\t%s\n",$1,arr[i];}}/#/' file

# 6  
Old 07-23-2009
I would think that the field-separator needs to be set to a tab.
# 7  
Old 07-23-2009
That's the output on my OS.
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