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Full Discussion: Use variables for cut command
Top Forums UNIX for Dummies Questions & Answers Use variables for cut command Post 302887774 by bakunin on Monday 10th of February 2014 05:59:26 PM
Old 02-10-2014
Quote:
Originally Posted by Gussifinknottle
Code:
#!/bin/sh
 
while read p q r
do
	cut -f "$q,$r" matrix > $p.cols
done < matrix.pair.cols

exit 0

I suggest you first make sure your variables are set correctly. Try:

Code:
#!/bin/sh
 
while read p q r ; do
	echo p: \"$p\"    q: \"$q\"    r: \"$r\"
	echo "cut -f \"$q,$r\" matrix > $p.cols"
done < matrix.pair.cols

exit 0

It might be that your source file contains hidden formatting characters which will not show in the copy here but may interrupt the reading of your file. It never hurts to ascertain each step separately.

The next thing is to apply the printed cut-commands manually one by one and see if they work as expected. One problem might be that you need to specify a field-delimiter (see option "-d" of "cut") to parse the file "matrix" correctly (not all cut-versions will understand tabs instead of spaces, for instance).

Btw: in scripts i would - just to be 1000% sure - always write "${var}" instead of "$var". In most cases the latter works the same, but in some combinations (within complex statements) the former might avoid ambiguity. Therefore:

Code:
	echo "cut -f \"${q},${r}\" matrix > ${p}.cols"

I hope this helps.

bakunin
 

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LEARN ABOUT DEBIAN

graphics::primitive::insets

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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