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Help with extracting strings from a file

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# 1  
Old 01-12-2007
Help with extracting strings from a file
I want to collect the characters from 1-10 and 20-30 from each line of the file and take them in a file in the following format.Can someone help me with this :



string1,string2
string1,string2
string1,string2
:
:
:
:
# 2  
Old 01-12-2007
yea

use cut and paste command



cut -c1-10 filename > temp1
cut -c20-30 filename > temp2

paste temp1 temp2 > final

or
can use sed also
# 3  
Old 01-12-2007
Code:
sed "s/\(.\{10\}\).\{9\}\(.\{10\}\).*/\1,\2/" file

# 4  
Old 01-12-2007
Code:
awk '{ printf "%s,%s\n", substr($0, 1, 10), substr($0, 20, 30) }' filename

# 5  
Old 01-12-2007
Quote:
Originally Posted by matrixmadhan
Code:
awk '{ printf "%s,%s\n", substr($0, 1, 10), substr($0, 20, 30) }' filename


the above script may give other output if we have spaces or blank lines, so better would be to use cut and paste command or the above sed script is again a correct one for your search
# 6  
Old 01-12-2007
Quote:
Originally Posted by maheshwin
the above script may give other output if we have spaces or blank lines, so better would be to use cut and paste command or the above sed script is again a correct one for your search
You are right, it will have a "," if there are blank lines

this would solve that,

Code:
awk ' { if( length($0) > 0 ) {printf "%s,%s\n", substr($0, 10, 20), substr($0, 20, 30) } }' filename

What if there are spaces? I dont get that really! Could you please explain?
# 7  
Old 01-12-2007
If you have Python, here's an alternative:
Code:
o = open("newfile","a")
for line in open("input"):
    o.write( "%s , %s\n" % (line[0:10] , line[19:30] ) )
o.close()
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