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text processing ( sed/awk)

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# 1  
Old 02-29-2008
text processing ( sed/awk)
hi..
I have a file having record on in 1 line....

I want every 400 characters in a new line...

means in 1st line 1-400
in 2nd line - 401-800 etc


pl help.
# 2  
Old 02-29-2008
Quote:
Originally Posted by anchal_khare
hi..
I have a file having record on in 1 line....

I want every 400 characters in a new line...

means in 1st line 1-400
in 2nd line - 401-800 etc


pl help.
Code:
sed -e "s/.\{400\}/&\n/g" file.txt

# 3  
Old 02-29-2008
hi vino...
its not working..
its showing me the same output...
i tested in a small file having abcdefghijklmopqrstuvwxyz in a line....

so after -e "s/.\{4\}/&\n/g" file.txt

the output should be
abcd
efgh
ijkl
lmno
...
...


but its unchaged..

pl help
# 4  
Old 02-29-2008
script

total_chars=`wc -c filename | cut -c 1-8 `
block_size=400
cut_from=1
cut_to=400
total_chars=`expr $total_chars + 0`
#The above step is to get total_chars treated as number for below comparison
while [ $cut_from -le $total_chars ]
do
cut -c `echo $cut_from`-`echo $cut_to` filename >> outfile
cut_from=`expr $cut_from + $block_size`
cut_to=`expr $cut_to + $block_size`
done
# 5  
Old 02-29-2008
A solution with awk:

Code:
awk 'BEGIN{nr=1}{while(substr($0,nr,400)){print substr($0,nr,400);nr+=400}}' file

Regards
# 6  
Old 02-29-2008
Thanks Franklin52,Smilie

hi anchal_khare,

u can also check the below code

awk '{n=1;while( n<=length($0)) { t = substr($0,n,4); print t"\n"; n= n+4} }' Filename

Input:
abcdefghijklmnopqrstuvwxyz

output
abcd

efgh

ijkl

mnop

qrst

uvwx

yz
# 7  
Old 02-29-2008
very thanks for evy1 soln....
'll use any of thm...

1 request .. can any1 chk the vino's soln.. why its nor working...
logic seems to be current,,, but i cunt find out the error...

thanks again..

anchal.
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