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Top Forums UNIX for Dummies Questions & Answers awk for scientific notion and decimal combined data Post 302519947 by drl on Thursday 5th of May 2011 12:27:35 PM
Old 05-05-2011
Hi.

Changing the input data, this script works:
Code:
#!/usr/bin/env bash

# @(#) s1	Demonstrate proper scientific & engineering numerical syntax.

# Utility functions: print-as-echo, print-line-with-visual-space, debug.
pe() { for i;do printf "%s" "$i";done; printf "\n"; }
pl() { pe;pe "-----" ;pe "$*"; }
db() { ( printf " db, ";for i;do printf "%s" "$i";done; printf "\n" ) >&2 ; }
db() { : ; }
C=$HOME/bin/context && [ -f $C ] && . $C awk

FILE=${1-data1}

pl " Input file $FILE:"
cat $FILE

pl " Results:"
awk '($1 <0.05) {print $1}' $FILE

exit 0

producing:
Code:
% ./s1

Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility "version")
OS, ker|rel, machine: Linux, 2.6.26-2-amd64, x86_64
Distribution        : Debian GNU/Linux 5.0.7 (lenny) 
GNU bash 3.2.39
GNU Awk 3.1.5

-----
 Input file data1:
0.04
0.01
0.11
0.55
3.1*e-6
4.1e-6

-----
 Results:
0.04
0.01
4.1e-6

Best wishes ... cheers, drl
 

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XPRINTF_EXEC(3) 					   BSD Library Functions Manual 					   XPRINTF_EXEC(3)

NAME
asxprintf_exec, dxprintf_exec, fxprintf_exec, sxprintf_exec, xprintf_exec, vasxprintf_exec, vdxprintf_exec, vfxprintf_exec, vsxprintf_exec, vxprintf_exec -- execute-only extensible printf execution SYNOPSIS
#include <printf.h> int asxprintf_exec(char ** restrict ret, printf_comp_t restrict pc, ...); int dxprintf_exec(int fd, printf_comp_t restrict pc, ...); int fxprintf_exec(FILE * restrict stream, printf_comp_t restrict pc, ...); int sxprintf_exec(char * restrict str, size_t size, printf_comp_t restrict pc, ...); int xprintf_exec(printf_comp_t restrict pc, ...); #include <stdarg.h> int vasxprintf_exec(char ** restrict ret, printf_comp_t restrict pc, va_list ap); int vdxprintf_exec(int fd, printf_comp_t restrict pc, va_list ap); int vfxprintf_exec(FILE * restrict stream, printf_comp_t restrict pc, va_list ap); int vsxprintf_exec(char * restrict str, size_t size, printf_comp_t restrict pc, va_list ap); int vxprintf_exec(printf_comp_t restrict pc, va_list ap); DESCRIPTION
These functions are execute-only, extensible printf (see xprintf(5)) variants, taking a printf_comp_t structure created by the format string compilation routine new_printf_comp(3). All these variants behave like their normal printf counterparts (see printf(3)) without 'x' and ``_exec'' in the name (except sxprintf_exec() and vsxprintf_exec() behave like snprintf() and vsnprintf(), respectively). SEE ALSO
printf(3), xprintf_comp(3), xprintf(5) Darwin Aug 19, 2012 Darwin
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