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Decimal conversion number of the form x.xx to 0x.xx, sed?

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# 1  
Old 09-12-2014
Decimal conversion number of the form x.xx to 0x.xx, sed?
Hello
I have a file of the form

Code:
...
num  0.12 num num
num 25.53 num num
num  7.82 num num
......

and I want to convert the 2nd field of each line adding a "0" at the numbers >= 0 and < 10 so the output will have the form:

Code:
...
num  00.12 num num
num 25.53 num num
num  07.82 num num
...

I tried with
Code:
sed 's/ 7./07./2'

but it is not white space sensitive so it replaces any occurance of "7."

Thanks in advance for the help
# 2  
Old 09-12-2014
Try
Code:
sed 's/^num  \([0-9]\)\./num 0\1\./'

This User Gave Thanks to junior-helper For This Post:
phaethon
# 3  
Old 09-12-2014
thank you for the reply but it does not work : (
# 4  
Old 09-12-2014
What/How does not work *exactly*?
# 5  
Old 09-12-2014
I use
Code:
 sed 's/^num  \([0-9]\)\./num 0\1\./' file1 > file2
diff file1 file2

and they are the same (using GNU sed)
# 6  
Old 09-12-2014
but what is in file1 ?
Because based on what you gave us in post#1 I see no reason why it should not work...
# 7  
Old 09-12-2014
Quote:
Originally Posted by vbe
but what is in file1 ?
Because based on what you gave us in post#1 I see no reason why it should not work...
Thanks for the reply.
The form of this file is

Code:
...
201401031200271538 24.50  21 48.70   8.94   0.00 22  8  ...
201401031904573638  5.25  22  2.88  19.15   0.00 12 10 ...
201401041845314038 21.84  21 49.73   9.31   0.00 23 10 ...
...

and the output should be:
Code:
...
201401031200271538 24.50  21 48.70   8.94   0.00 22  8  ...
201401031904573638 05.25  22  2.88  19.15   0.00 12 10 ...
201401041845314038 21.84  21 49.73   9.31   0.00 23 10 ...
...
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