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Full Discussion: How to find sum of any 'n' number of values from file matching target value?
Top Forums Shell Programming and Scripting How to find sum of any 'n' number of values from file matching target value? Post 302843948 by Chubler_XL on Thursday 15th of August 2013 07:11:26 PM
Old 08-15-2013
How about:

Code:
sort -n infile | awk -vn=4 -vt=209.35 '
function check(vals, s, need, depth)
{
    for (;s<=X; s++) {
       if(depth && F[s]<need) check(vals ORS F[s], s+1, need-F[s], depth-1)
       if(!depth&&F[s]==need) printf vals ORS F[s] ORS
       if(F[s]>=need) return
    }
}
{F[++X]=$0}
END { check("", 1, t, n-1) }'

8.10
25.5
75.5
100.25

Last edited by Chubler_XL; 08-15-2013 at 08:25 PM..
 

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LEARN ABOUT REDHAT

sum

sum(n)									sum								    sum(n)

NAME

       sum - calculate a sum(1) compatible checksum

SYNOPSIS

       package require Tcl 8.2

       package require sum ?1.0?

       ::crc::sum ?-format format? message

       ::crc::sum ?-format format? -filename file

DESCRIPTION

       This  package  provides	a Tcl-only implementation of the sum(1) command which calculates a 16 bit checksum value from the input data.  The
       BSD sum algorithm is used by default but the SysV algorithm is also available.

COMMANDS

       ::crc::sum ?-format format? message

       ::crc::sum ?-format format? -filename file
	      The command takes string data or a file name and returns a checksum value calculated using the sum(1) algorithm. The result is  for-
	      matted using the format(n) specifier provided or as an unsigned integer (%u) by default.

OPTIONS

       -filename name
	      Return a checksum for the file contents instead of for parameter data.

       -format string
	      Return the checksum using an alternative format template.

EXAMPLES

       % crc::sum "Hello, World!"
       37287

       % crc::sum -format 0x%X "Hello, World!"
       0x91A7

       % crc::sum -file sum.tcl
       13392

SEE ALSO

       sum(1), cksum(n), crc32(n)

AUTHORS

       Pat Thoyts

KEYWORDS

       sum, cksum, checksum, crc, crc32, cyclic redundancy check, data integrity, security

crc									1.0								    sum(n)
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