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Rename a header column by adding another column entry to the header column name

 
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# 1  
Old 08-04-2011
Power Rename a header column by adding another column entry to the header column name
Hi All,

I have a file example.csv which looks like this

GrpID,TargetID,Signal,Avg_Num
CSCH74_1_1,2007,61,256
CSCH74_1_1,212007,647,679
CSCH74_1_1,12007,3,32
CSCH74_1_1,207,299,777

I want the output as

GrpID,TragetID,Signal-CSCH74_1_1,Avg_Num
CSCH74_1_1,2007,61,256
CSCH74_1_1,212007,647,679
CSCH74_1_1,12007,3,32
CSCH74_1_1,207,299,777

That is to say, the Signal header becomes Signal-CSCH74_1_1 using the 1st column entry.

Please help me urgently!!

Thanks
Last edited by Vavad; 08-05-2011 at 12:19 PM..
# 2  
Old 08-06-2011
Code:
$ cat tst
GrpID,TargetID,Signal,Avg_Num
CSCH74_1_1,2007,61,256
CSCH74_1_1,212007,647,679
CSCH74_1_1,12007,3,32
CSCH74_1_1,207,299,777
$ awk -F, '{A[NR]=$0}END{sub("Signal","Signal-" $1,A[1]);for(i=0;++i<=NR;) print A[i] }' tst
GrpID,TargetID,Signal-CSCH74_1_1,Avg_Num
CSCH74_1_1,2007,61,256
CSCH74_1_1,212007,647,679
CSCH74_1_1,12007,3,32
CSCH74_1_1,207,299,777

 
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