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Top Forums UNIX for Dummies Questions & Answers How to modify lines without certain patterns? Post 302744157 by itkamaraj on Friday 14th of December 2012 12:40:41 AM
Old 12-14-2012
Quote:
Originally Posted by luoruicd
I have file like this:
rs111 A T 0.9 0.8 ...
rs112 AT T 0.8 0.2 ...
rs113 G CT 0.9 0.1...

I wish to replace all the NONE "A" or "T" or "G" or "C" values in column 3 and column 4 to " ", how can I do this?

thanks!
i dont understand the above highlighted statement. can you give more input and the expected output.

$0 - indicates the current line (processing line) in awk
 

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GRUB-RENDER-LABEL(1)                                               User Commands                                              GRUB-RENDER-LABEL(1)

NAME
grub-render-label - generate a .disk_label for Apple Macs. SYNOPSIS
grub-render-label [OPTION...] [OPTIONS] DESCRIPTION
Render Apple .disk_label. -b, --bgcolor=COLOR use COLOR for background -c, --color=COLOR use COLOR for text -f, --font=FILE use FILE as font (PF2). -i, --input=FILE read text from FILE. -o, --output=FILE set output filename. Default is STDOUT -t, --text=STRING set the label to render -v, --verbose print verbose messages. -?, --help give this help list --usage give a short usage message -V, --version print program version Mandatory or optional arguments to long options are also mandatory or optional for any corresponding short options. REPORTING BUGS
Report bugs to <bug-grub@gnu.org>. SEE ALSO
The full documentation for grub-render-label is maintained as a Texinfo manual. If the info and grub-render-label programs are properly installed at your site, the command info grub-render-label should give you access to the complete manual. grub-render-label (GRUB) 2.02-2ubuntu8.3 July 2018 GRUB-RENDER-LABEL(1)
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