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Old 10-04-2008
jolecanard jolecanard is offline
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Join Date: Sep 2008
Posts: 36
Unhappy awk is changing my FS !!

Hello there,

Here is (a part) of the file I want to change. Note the three spaces before the "3" (could be "2" or "0" also).

Code:
   3 621530  1.1935E-02 631530  1.1293E+01 641530  1.1117E-02 571540  4.4419E-14
   3 581540  2.6670E-10 591540  3.8610E-09 601540  1.1016E-06 611540  3.2618E-06
   3 611541  6.5572E-07 621540  9.8307E+00 631540  3.1177E+00 641540  1.4615E+00
   3 571550  0.0000E+00 581550  8.8139E-12 591550  1.0739E-09 601550  2.5639E-07
   3 611550  1.1011E-06 621550  3.6787E-05 631550  3.4821E+00 641550  3.1855E+00
   3 641551  0.0000E+00 581560  9.4585E-13 591560  7.5358E-11 601560  1.2023E-07
   3 611560  1.7968E-07 621560  5.4237E-04 631560  3.0054E-02 641560  6.5687E+00
   3 581570  2.3926E-14 591570  9.9322E-12 601570  4.3929E-09 611570  4.6793E-07
   3 621570  5.5911E-06 631570  6.3564E-04 641570  3.2355E+00 591580  2.8608E-13
I want to find some ID (eg. 621530) and change the value following it.

I am using this script:
Code:
VALUE=".........."
awk -v var="$VALUE" 'BEGIN{}
NR==FNR{a[$0]=$0; next}
{for(i=2;i<9;i+=2)if($i in a){$(i+1)=var}}
#{$1="   "$1}
{print}' ID_to_be_changed my_file
The problem is that it removes the three spaces in front of the row if it changes something in the row...removing the commented line solves the problem.
However I do not know how to keep the same number of spaces between the rows: 2 spaces between the ID and the following value, and 1 space between a value and the ID after that (the script above turns everything into a single space).

Can someone help me?