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Full Discussion: Difference script
Top Forums Shell Programming and Scripting Difference script Post 302418460 by aigles on Tuesday 4th of May 2010 10:54:49 AM
Old 05-04-2010
Try and adapt the following AWK command :
Code:
awk '
function abs(n) {
   return (n<0 ? -n : n)
}
NR==FNR { Old[$1] = $3 ; next }
{
   diff = ""
   if ($1 in Old && $3 != Old[$1] )
      diff = sprintf("   %5.2f", abs($3-Old[$1]));
   print $0 diff
}
' yday.txt today.txt

Jean-Pierre.
 

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abs(3C) 						   Standard C Library Functions 						   abs(3C)

NAME
abs, labs, llabs - return absolute value of integer SYNOPSIS
#include <stdlib.h> int abs(int val); long labs(long lval); long long llabs(long long llval); DESCRIPTION
The abs() function returns the absolute value of its int operand. The labs() function returns the absolute value of its long operand. The llabs() function returns the absolute value of its long long operand. USAGE
In 2's-complement representation, the absolute value of the largest magnitude negative integral value is undefined. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ SEE ALSO
attributes(5), standards(5) SunOS 5.10 24 Jul 2002 abs(3C)
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