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Shell Programming and Scripting
Removing blanks in a text tab delimited file
Post 302267253 by zaxxon on Friday 12th of December 2008 03:04:43 AM
12-12-2008
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I have a large text-file with tab-delimited genetic data that looks like:
KSC112 KSC234 0 0 1 1 A G C T
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Hi All
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sed /^\t.\t/d File1 > File2
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Hello,
I have some tab delimited files that may contain blank columns. I would like to delete the blank columns if they exist. There is no clear pattern for when a blank occurs.
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sed 's/\t\t//g'
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LEARN ABOUT X11R4
unexpand
UNEXPAND(1) User Commands UNEXPAND(1) NAME
unexpand - convert spaces to tabs SYNOPSIS
unexpand [OPTION]... [FILE]... DESCRIPTION
Convert blanks in each FILE to tabs, writing to standard output. With no FILE, or when FILE is -, read standard input. Mandatory arguments to long options are mandatory for short options too. -a, --all convert all blanks, instead of just initial blanks --first-only convert only leading sequences of blanks (overrides -a) -t, --tabs=N have tabs N characters apart instead of 8 (enables -a) -t, --tabs=LIST use comma separated list of tab positions The last specified position can be prefixed with '/' to specify a tab size to use after the last explicitly specified tab stop. Also a prefix of '+' can be used to align remaining tab stops relative to the last speci- fied tab stop instead of the first column --help display this help and exit --version output version information and exit AUTHOR
Written by David MacKenzie. REPORTING BUGS
GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Report unexpand translation bugs to <http://translationproject.org/team/> COPYRIGHT
Copyright (C) 2017 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. SEE ALSO
expand(1) Full documentation at: <http://www.gnu.org/software/coreutils/unexpand> or available locally via: info '(coreutils) unexpand invocation' GNU coreutils 8.28 January 2018 UNEXPAND(1)