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Top Forums Shell Programming and Scripting Print columns in a file by number list in another file Post 302386322 by Zoho on Tuesday 12th of January 2010 06:57:45 AM
Old 01-12-2010
Print columns in a file by number list in another file

This should follow with my last post but I think it's better to start a new one. Now I have a list of numbers stored in pos.txt:

Code:
2
6
7
.
.
.
n
.
.
.

And I need to extract (2n-1, 2n) columns from matrix.txt:

Code:
ind1 A B C D E F G H I J K L M N O P Q R ...
ind2 B C D E F G H I J K L M N O P Q R S ...
ind3 C D E F G H I J K L M N O P Q R S T ...

The returned result should be like:

Code:
ind1 C D K L M N ...
ind2 D E L M N O ...
ind3 E F M N O P ...

With each number (n) read from list pos.txt, I was thinking of using something like

Code:
awk '{FS=" "; print $1" "$2*$n-1" "$2*$n}' matrix.txt

Sorry that I don't know much about awk but really appreciate your help!
 

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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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