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Change file output format

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# 1  
Old 12-03-2009
Change file output format
I have a file which has following contents

Code:
usmtnz-dinfsi19
62
61
18400
18800
99.7
usmtnz-dinfsi19
62
61
18400
18800
99.7

i want the o/p to be like
Code:
date 
usmtnz-dinfsi19   62   61    18400    18800    99.7 
date 
usmtnz-dinfsi19   64   65    20000    23000    88.9 
date 
.........n

how can i do that ?
# 2  
Old 12-03-2009
code:-

Code:
gawk '(NR%6){s=s" "$0 ;next} 
((NR+1)%6){"date"|getline d ; print d"\n"s" " $0 ; s="" }
'  infile.txt > outfile.txt

SmilieSmilieSmilieSmilie

---------- Post updated at 18:07 ---------- Previous update was at 18:04 ----------

or if you want the date format to be YYYY-MM-DD

Code:
nawk '(NR%6){s=s" "$0 ;next}
((NR+1)%6){"date  '+%Y-%m-%d'"|getline d ; print d"\n"s" " $0 ; s="" }
' file.txt > out.txt

SmilieSmilieSmilieSmilie
# 3  
Old 12-03-2009
Cool ,thank you very much now is it possible to use arithmetic operations on the output like


Code:
64   65    20000/1000    23000/1000    100 - 88.9

And one more thing can you please refer to a awk,nawk link where i can learn it ?
# 4  
Old 12-03-2009
just cuz it's a handy trick:

Code:
pr -l1 -t -6 a

( But seriously, the "date" command is going to be the same practically for everyline unless you're running a file with a zillion lines. What value does that provide?! )
# 5  
Old 12-03-2009
I didn't get what you wrote Smilie
# 6  
Old 12-04-2009
Code:
cat a.txt | paste - - - - - - | sed 'i\
        date
        '

# 7  
Old 12-08-2009
Thanx for the help
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