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Changing a value 11th character of each line

Discuss Changing a value 11th character of each line in the UNIX Help forum on Dev Shed.
Changing a value 11th character of each line UNIX Help forum discussing the Unix Operating System and all variants including Irix, Solarix, and AIX. Unix was designed as a true multi-user operating system.

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Old August 8th, 2004, 11:13 PM
svvc svvc is offline
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Changing a value 11th character of each line
Hi
I've a file there are around 1000 rows in it.
In each row at 25th position i've either value '1' or '2'
I would like to know the script or command which can swap the values.
If 1 is there on one line It should be changes to 2.
If 2 is there on one line It should be changes to 1.

Thanks in advance
Sachin
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Old August 9th, 2004, 12:41 AM
guggach guggach is offline
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put this in sedcmd:

s/\(.\{25\}\)\([12]\)\(.*\)/\1+++\2+++\3/
s/+++1+++/2/
s/+++2+++/1/

then enter:

sed -f sedcmd inputfile >output
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