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Top Forums Shell Programming and Scripting Print a field from the previous line Post 302517250 by ctsgnb on Tuesday 26th of April 2011 09:23:00 AM
Old 04-26-2011
Ah ... ooooops ok i missed the +500 ... let me fix my previous posts ...

... ok fixed

Note that you will have the following constraint :

1) Your first line must not have 0 in the field $2
2) If you have many consecutive line with the value 0 (in the column you want to check) they will have the same value (they will not be last $2+500)

if you want it to behave so then :

Code:
awk '$2{x=$2}!$2{x+=500;$2=x}1' infile

see the difference :

Code:
# cat tst
3408 5600
3796 6035
4200 6285
4676 0
4677 0
4678 0
40 1554
200 1998
652 2451
864 2728
1200 0

Code:
# awk '$2{x=$2}!$2{x+=500;$2=x}1' tst
3408 5600
3796 6035
4200 6285
4676 6785
4677 7285
4678 7785
40 1554
200 1998
652 2451
864 2728
1200 3228

Code:
# awk '$2{x=$2}!$2{$2=x+500}1' tst
3408 5600
3796 6035
4200 6285
4676 6785
4677 6785
4678 6785
40 1554
200 1998
652 2451
864 2728
1200 2728


Last edited by ctsgnb; 04-26-2011 at 11:29 AM..
 

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Graphics::Primitive::Insets(3pm)			User Contributed Perl Documentation			  Graphics::Primitive::Insets(3pm)

NAME
Graphics::Primitive::Insets - Space between things DESCRIPTION
Graphics::Primitive::Insets represents the amount of space that surrounds something. This object can be used to represent either padding or margins (in the CSS sense, one being inside the bounding box, the other being outside) SYNOPSIS
use Graphics::Primitive::Insets; my $insets = Graphics::Primitive::Insets->new({ top => 5, bottom => 5, left => 5, right => 5 }); METHODS
Constructor new Creates a new Graphics::Primitive::Insets. Instance Methods as_array Return these insets as an array in the form of top, right, bottom and left. bottom Set/Get the inset from the bottom. equal_to Determine if these Insets are equal to another. left Set/Get the inset from the left. right Set/Get the inset from the right. top Set/Get the inset from the top. zero Sets all the insets (top, left, bottom, right) to 0. AUTHOR
Cory Watson, "<gphat@cpan.org>" SEE ALSO
perl(1) COPYRIGHT &; LICENSE Copyright 2008-2010 by Cory G Watson. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.12.3 2010-08-21 Graphics::Primitive::Insets(3pm)
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