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How to input text on every 2nd line?

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# 1  
Old 04-06-2010
How to input text on every 2nd line?
I have a file in two columns consisting of only numbers. I would like to put a string (the same textstring) on every second line, so that

501006 420.000
401602 165.000
.
.
.

becomes:

*Some_text
501006 420.000
*Some_text
401602 165.000
*Some_text
.
.
.

Are you up for it?
Thx...
# 2  
Old 04-06-2010
Code:
awk ' { print $0; print "*some text"} ' inputfile > outputfile

# 3  
Old 04-06-2010
Using awk you can write:

Code:
awk '{ print; print "*Some_text"; }' input_file

# 4  
Old 04-06-2010
Code:
$
$
$ cat f7
501006 420.000
401602 165.000
123456 789.012
$
$ perl -pne '$_.="AND_SOME_TEXT_HERE\n"' f7
501006 420.000
AND_SOME_TEXT_HERE
401602 165.000
AND_SOME_TEXT_HERE
123456 789.012
AND_SOME_TEXT_HERE
$
$

tyler_durden

To add the text on first line as well -

Code:
$
$ perl -pne 'BEGIN{$t="AND_SOME_TEXT_HERE"} $.==1 ? $_="$t\n$_" : $_.="$t\n"' f7
AND_SOME_TEXT_HERE
501006 420.000
AND_SOME_TEXT_HERE
401602 165.000
AND_SOME_TEXT_HERE
123456 789.012
AND_SOME_TEXT_HERE
$
$

Last edited by durden_tyler; 04-06-2010 at 11:33 AM..
# 5  
Old 04-06-2010
Code:
sed 'i\
*Some_text
' file

# 6  
Old 04-06-2010
Quote:
Originally Posted by alister
Code:
sed 'i\
*Some_text
' file

Hi,

sorry, but you must use the command a (append). Smilie

Greeting
# 7  
Old 04-06-2010
Quote:
Originally Posted by grepFruit
Hi,

sorry, but you must use the command a (append). Smilie

Greeting
Welcome to the forums, grepfruit (love the nick Smilie).

If you look at the sample data provided, you'll see that the inserted text precedes each line. That is not an append.

Regards,
Alister
Last edited by alister; 04-06-2010 at 01:44 PM..
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