Make copy of text file with columns removed (based on header) Post: 302931578

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Top Forums Shell Programming and Scripting Make copy of text file with columns removed (based on header) Post 302931578 by LMHmedchem on Wednesday 14th of January 2015 01:31:21 AM

01-14-2015

Registered User

Make copy of text file with columns removed (based on header)

Hello,

I have some tab delimited text files with a three header rows. The headers look like, (sorry the tabs look so messy).

Code:

index	group	Name	input	input	input	input	input	input	input	input	input	input	input
int	char	string	double	double	double	double	double	double	double	double	double	double	double
id	group	Name	AtR_Ptb_L	flatness	inv_dx2	rvalHyd	sumLip	xv0	dxv1	Gmax	k2	Spyridin_N	Salph_N

The files could have any number of columns. What I need to do is simple. I just need to copy the file with one or more columns removed. The columns to be removed would be specified by the value in the third row. For example, I could want the files with columns "dxv1" and "k2" removed.

Code:

index	group	Name	input	input	input	input	input	input	input	input	input
int	char	string	double	double	double	double	double	double	double	double	double
id	group	Name	AtR_Ptb_L	flatness	inv_dx2	rvalHyd	sumLip	xv0	Gmax	Spyridin_N	Salph_N

The order of the remaining columns should be the same. It doesn't matter how the list of columns to be removed is formatted. It can be any kind of list.

I have read posts about how to copy specific columns with cut or awk, but not how to skip specific cols and copy everything else. One thing to do would be to find the position of the cols to be removed and use cut, but how to set that up to work in a general implementation is a bit unclear to me. I also suspect that awk would be more efficient.

Any suggestions?

LMHmedchem

LMHmedchem

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gsdj500

GSLP(1) 							    Ghostscript 							   GSLP(1)

NAME

       gslp - Format and print text using ghostscript
       gsbj - Format and print text for BubbleJet printer using ghostscript
       gsdj - Format and print text for DeskJet printer using ghostscript
       gsdj500 - Format and print text for DeskJet 500 BubbleJet using ghostscript
       gslj - Format and print text for LaserJet printer using ghostscript

SYNOPSIS

       gslp -12BclqRr -b<header> -f<font> -F<hfont> -L<lines> -p<outfile> -T<n> --add-to-space <units> --add-to-width <units> --columns <n>
       --detect --first-page <n> --kern <file.afm> --last-page <n> --(heading|footing)-(left|center|right) <string> --margin-(top|bot-
       tom|left|right) <inches> --no-eject-(file|formfeed) --spacing <n> [gs options] [files]
       gsbj [options] [files]
       gsdj [options] [files]
       gsdj500 [options] [files]
       gslj [options] [files]

DESCRIPTION

       This  utility  provides	functionality approximately equivalent to the Unix enscript(1) program.  It prints plain text files using a single
       font.  It currently handles tabs and formfeeds, but not backspaces.  It will line-wrap when using fixed-pitch fonts.  It will also do kern-
       ing and width adjustment.

       The default device (-sDEVICE=) and resolution (-r) are as follows:
	     gslp      epson	  180
	     gsbj      bj10e	  180
	     gsdj      deskjet	  300
	     gsdj500   djet500	  300
	     gslj      laserjet   300
       By default the current date is formatted as the center header.

OPTIONS

       Standard switches implemented:
	      -12BclqRr -b<header> -f<font> -F<hfont> -L<lines> -p<outfile>

       Sun switches implemented:
	      -T<n>	set tab width

       Switches ignored:
	      -GghKkmow -# -C -d -J -n -P -S -s -t -v

       Switches added:

	      --add-to-space <units>
		     add the given number of 1/72" units to the width of each space (may be negative)

	      --add-to-width <units>
		     add the given number of 1/72" units to the width of each character (may be negative)

	      --columns <n>
		     print in <n> columns

	      --detect
		     treat the file as PostScript if it starts with %!

	      --first-page <n>
		     start printing at page <n>

	      --kern <file.afm>
		     kern using information from the given .AFM file

	      --last-page <n>
		     stop printing after page <n>

	      --(heading|footing)-(left|center|right) <string>
		     set the heading/footing fields; use -B first to clear

	      --margin-(top|bottom|left|right) <inches>
		     set a margin

	      --no-eject-(file|formfeed)
		     end-of-file/FF only starts a new column, not a new sheet

	      --spacing <n>
		     use double (n=2), triple (n=3), etc. spacing
       Also, the string %# in a heading or footing is replaced with the page #.

SEE ALSO

       gs(1)

VERSION

       This document was last revised for Ghostscript version 9.07.

AUTHOR

       Artifex Software, Inc. are the primary maintainers of Ghostscript.  This manpage by George Ferguson.

9.07								 12 February 2013							   GSLP(1)