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Top Forums Shell Programming and Scripting awk or other way to find out number of occurrence of 7th character Post 302990858 by RudiC on Wednesday 1st of February 2017 04:57:50 PM
Old 02-01-2017
Similar to what has been posted so far but allowing to count occurrences of undesired characters:
Code:
awk '
        {TMP = substr ($0, 7, 1)
         if (TMP ~ "[" SRCH "]") C[TMP"_hosts"]++
         else                    C["None   "]++
        }
END     {for (c in C) print c, "=", C[c]
        }
' SRCH="pdo" file

d_hosts = 1
None    = 8
p_hosts = 17
o_hosts = 1


Last edited by RudiC; 02-03-2017 at 04:02 PM..
 

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CTYPE(3)						     Library Functions Manual							  CTYPE(3)

NAME
ctype, isalpha, isupper, islower, isdigit, isxdigit, isalnum, isspace, ispunct, isprint, isgraph, iscntrl, isascii, toupper, tolower, toascii - character classification macros SYNOPSIS
#include <ctype.h> int isalpha(int c) ... DESCRIPTION
These macros classify characters by table lookup. Each is a predicate returning nonzero for true, zero for false. Isascii and toascii are defined on all integer values; the rest are defined only on the range of unsigned char and on the special value EOF (see stdio(3)). isalpha c is a letter isupper c is an upper case letter islower c is a lower case letter isdigit c is a digit isxdigit c is a hex digit isalnum c is an alphanumeric character isspace c is a space, tab, carriage return, newline, vertical tab, or formfeed ispunct c is a punctuation character (neither control nor alphanumeric) isprint c is a printing character, code 040(8) (space) through 0176 (tilde) isgraph c is a printing character, similar to isprint except false for space. iscntrl c is a delete character (0177) or ordinary control character (less than 040). isascii c is an ASCII character, code less than 0200 tolower c is converted to lower case. Return value is undefined if not isupper(c). toupper c is converted to upper case. Return value is undefined if not islower(c). toascii c is converted to be a valid ascii character. SEE ALSO
ascii(7) 7th Edition May 12, 1986 CTYPE(3)
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