add comma

alisevA3 · #1 (**permalink**) 10-18-2002

I have a file like this

101223345
23232344a
1312a3441
903821224
143434324
101223345
23232344a
1312a3441

I want to insert comma in 5 digit.
it should be like
10122,3345
23232,344a

how can I do this ?

thanks
Alice...

Perderabo · #2 (**permalink**) 10-18-2002

sed 's/$^.....$/\1,/' < input > output

Vishnu · #3 (**permalink**) 10-18-2002

try this...

for i in `cat yourfile`
do
col1=`echo $i | cut -b1-5`
col2=`echo $i | cut -b6-`
echo $col1 ',' $col2
done

there will be more straight forward way than this... and I will love to see that...

Vishnu · #4 (**permalink**) 10-18-2002

I got the answer I wanted!

correct me if I'm wrong... here Perderabo used sed with a tagged regular expression

$^.....$ -- this will tag the first 5 characters in the input string

\1, -- \1 refers the above tagged 5 characters and just put a , after that...

this is elegant...

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