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Print a Search Pattern after modification

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# 1  
Old 06-08-2011
Print a Search Pattern after modification
Using either vim or awk or sed

If I wish to to search for an unknown pattern - lets say 1B2495 or 1Q2345

so Search pattern : 1[A-Z][0-9][0-9][0-9][0-9]

and replace the 1 with 2 to print out :

2B2495 or 2Q2345

what are the possible commands.

Struggling here - help would be appreciated.
# 2  
Old 06-08-2011
Sed:

Code:
sed 's/1\([A-Z][0-9][0-9][0-9][0-9]\)/2\1/g' file

This User Gave Thanks to clx For This Post:
dpooleco
# 3  
Old 06-08-2011
alternate pattern..
Code:
 /^[1-2][A-Z][0-9]\{4\}$/

# 4  
Old 06-08-2011
Brilliant - works perfectly thank you.
# 5  
Old 06-08-2011
Michaelrozar17 ~ how does this one work ?
# 6  
Old 06-08-2011
Its another version of anchal_khare's solution. The above given pattern in post# 3 matches 2B2495 or 2Q2345 or 1B2495 or 1Q2345. I didn notice that you need to change 1 to 2. Below is the modified one. Instead of writing [0-9] four times we code as [0-9]\{4\} which also means the same.
Code:
sed 's/^1\([A-Z][0-9]\{4\}$\)/2\1/' inputfile > outfile

This User Gave Thanks to michaelrozar17 For This Post:
dpooleco
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