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Full Discussion: Division by zero attempted error during linear conversion of values between 0.25 to 1
Top Forums Shell Programming and Scripting Division by zero attempted error during linear conversion of values between 0.25 to 1 Post 303000988 by sammy777888 on Monday 24th of July 2017 06:42:14 PM
Old 07-24-2017
Division by zero attempted error during linear conversion of values between 0.25 to 1
I want to implement the below formula with awk oneliner
Code:
new_value = ((old_value - old_min) / (old_max - old_min) ) * (new_max - new_min) + new_min

I want to pass the value of old_min and old_min as variable. Here is what I did for this
Code:
old_min=$(awk 'BEGIN{a=100000000000}{if ($10<0+a) a=$10} END{print a}' temp11)
old_max=$(awk 'BEGIN{a=   0}{if ($10>0+a) a=$10} END{print a}' temp11)
echo $old_min
4828
echo $old_max
449064

Then I run the command, which gives the error message
Code:
awk '{ print $0, (($10 - $old_min)/($old_max - $old_min)) * ((1 - 0.25) + 0.25)}' temp11
awk: cmd. line:1: (FILENAME=temp11 FNR=1) fatal: division by zero attempted

Then I tried simply which worked fine
Code:
awk '{ print $0, (($10 - 4828)/(449064 - 4828)) * (1 - 0.25) + 0.25}' temp11

but I need to assign $old_min and $old_max dynamically as my script.sh run it inside the loop. Thanks
 

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LEARN ABOUT DEBIAN

locale::script

Locale::Script(3perl)					 Perl Programmers Reference Guide				     Locale::Script(3perl)

NAME

       Locale::Script - standard codes for script identification

SYNOPSIS

	  use Locale::Script;

	  $script  = code2script('phnx');		      # 'Phoenician'
	  $code    = script2code('Phoenician'); 	      # 'Phnx'
	  $code    = script2code('Phoenician',
				 LOCALE_CODE_NUMERIC);	      # 115

	  @codes   = all_script_codes();
	  @scripts = all_script_names();

DESCRIPTION

       The "Locale::Script" module provides access to standards codes used for identifying scripts, such as those defined in ISO 15924.

       Most of the routines take an optional additional argument which specifies the code set to use. If not specified, the default ISO 15924
       four-letter codes will be used.

SUPPORTED CODE SETS

       There are several different code sets you can use for identifying scripts. The ones currently supported are:

       alpha
	   This is a set of four-letter (capitalized) codes from ISO 15924 such as 'Phnx' for Phoenician.

	   This code set is identified with the symbol "LOCALE_SCRIPT_ALPHA".

	   The Zxxx, Zyyy, and Zzzz codes are not used.

	   This is the default code set.

       numeric
	   This is a set of three-digit numeric codes from ISO 15924 such as 115 for Phoenician.

	   This code set is identified with the symbol "LOCALE_SCRIPT_NUMERIC".

ROUTINES

       code2script ( CODE [,CODESET] )
       script2code ( NAME [,CODESET] )
       script_code2code ( CODE ,CODESET ,CODESET2 )
       all_script_codes ( [CODESET] )
       all_script_names ( [CODESET] )
       Locale::Script::rename_script  ( CODE ,NEW_NAME [,CODESET] )
       Locale::Script::add_script  ( CODE ,NAME [,CODESET] )
       Locale::Script::delete_script  ( CODE [,CODESET] )
       Locale::Script::add_script_alias  ( NAME ,NEW_NAME )
       Locale::Script::delete_script_alias  ( NAME )
       Locale::Script::rename_script_code  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Script::add_script_code_alias  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Script::delete_script_code_alias  ( CODE [,CODESET] )
	   These routines are all documented in the Locale::Codes man page.

SEE ALSO

       Locale::Codes
       Locale::Constants
       http://www.unicode.org/iso15924/
	   Home page for ISO 15924.

AUTHOR

       See Locale::Codes for full author history.

       Currently maintained by Sullivan Beck (sbeck@cpan.org).

COPYRIGHT

	  Copyright (c) 1997-2001 Canon Research Centre Europe (CRE).
	  Copyright (c) 2001-2010 Neil Bowers
	  Copyright (c) 2010-2011 Sullivan Beck

       This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.14.2							    2011-09-26						     Locale::Script(3perl)
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