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# 1  
Old 03-18-2008
search change write
Code:
i="1"
while [ $i -le 1000 ]
do
    k=`expr $i + 1`
    sed -e 's/"$i"/"$k"/' < somefile1.txt >> somefile2.txt
    i=`expr $i + 1`
done

ive been trying to :
1 from a file containing numbers in a row divided with correct number of spaces to find the corresponding one
2 change the value
3 and append it to somefile2.txt

problems
the somefile2.txt remains empty

HELP pls
Last edited by Yogesh Sawant; 03-18-2008 at 09:12 AM.. Reason: added code tags
# 2  
Old 03-18-2008
Hi,
Try the below script,
Code:
i="1"
while [ $i -le 1000 ]
do
    k=`expr $i + 1`
    cat somefile1.txt | sed -e 's/"$i"/"$k"/'  >> somefile2.txt
    i=`expr $i + 1`
done

Last edited by Yogesh Sawant; 03-18-2008 at 09:14 AM.. Reason: added code tags
# 3  
Old 03-18-2008
doesnt work
somefile2 created but empty
the somefile1 format is
Code:
00000214   5    1         12   49     38   49                  01-01-2008 14:05:14       10  59       45 32 CMS.32.STUT.I.20080105_153445_P_0296.dat  20          0718174439

thanks, never the less
Last edited by Yogesh Sawant; 03-18-2008 at 09:15 AM.. Reason: added code tags
# 4  
Old 03-19-2008
The reason is simple: inside single quotes the double quotes lose their function and revert back to being simple characters. Try it yourself:

Code:
# x="xxx"
# print $x
xxx
# print "$x"
xxx
# print '"$x"'
"$x"

The same you have done in your sed-script.

I hope this helps.

bakunin
 
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