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Full Discussion: How to ignore characters and print only numbers using awk?
Top Forums Shell Programming and Scripting How to ignore characters and print only numbers using awk? Post 302814089 by jlliagre on Tuesday 28th of May 2013 05:21:51 PM
Old 05-28-2013
@Yoda é is not a control character but a regular alphabetical accented one. Your script properly handle it as long as the character set is correct.

@Jotne You need to set the character set to UTF8:
Code:
$ LC_ALL=C awk '{gsub(/[[:punct:]]+|[[:alpha:]]+/," ");sub(/^[ ]*/,x);NF-=2}1' file         
70 15481 6991901
7078 15482 70121 é
709 15484 70183944
$ LC_ALL=en_US.UTF8 awk '{gsub(/[[:punct:]]+|[[:alpha:]]+/," ");sub(/^[ ]*/,x);NF-=2}1' file
70 15481 6991901
7078 15482 70121
709 15484 70183944

Here is a simpler way that isn't affected by the character set issue:

Code:
awk '{gsub("[^[:digit:]]+"," ");print $1,$2,$3}' file

This User Gave Thanks to jlliagre For This Post:
Yoda
 

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LEARN ABOUT ULTRIX

iswcntrl

ISWCNTRL(3)						     Linux Programmer's Manual						       ISWCNTRL(3)

NAME

       iswcntrl - test for control wide character

SYNOPSIS

       #include <wctype.h>

       int iswcntrl(wint_t wc);

DESCRIPTION

       The  iswcntrl() function is the wide-character equivalent of the iscntrl(3) function.  It tests whether wc is a wide character belonging to
       the wide-character class "cntrl".

       The wide-character class "cntrl" is disjoint from the wide-character class "print" and therefore also disjoint from its subclasses "graph",
       "alpha", "upper", "lower", "digit", "xdigit", "punct".

       For an unsigned char c, iscntrl(c) implies iswcntrl(btowc(c)), but not vice versa.

RETURN VALUE

       The  iswcntrl()	function  returns  nonzero if wc is a wide character belonging to the wide-character class "cntrl".  Otherwise, it returns
       zero.

ATTRIBUTES

       For an explanation of the terms used in this section, see attributes(7).

       +-----------+---------------+----------------+
       |Interface  | Attribute	   | Value	    |
       +-----------+---------------+----------------+
       |iswcntrl() | Thread safety | MT-Safe locale |
       +-----------+---------------+----------------+
CONFORMING TO

       POSIX.1-2001, POSIX.1-2008, C99.

NOTES

       The behavior of iswcntrl() depends on the LC_CTYPE category of the current locale.

SEE ALSO

       iscntrl(3), iswctype(3)

COLOPHON

       This page is part of release 4.15 of the Linux man-pages project.  A description of the project, information about reporting bugs, and  the
       latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.

GNU
								    2015-08-08							       ISWCNTRL(3)
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