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Full Discussion: help sum columns by break in first column with awk or sed or something.
Top Forums Shell Programming and Scripting help sum columns by break in first column with awk or sed or something. Post 302282620 by syadnom on Sunday 1st of February 2009 03:09:36 AM
Old 02-01-2009
actual data
here is some actual data since I dont understand how this works.
Quote:
MIL 000067 1 .030 X 1.125 CONTACT TIP EACH 0 2 072-08 A
MIL 000067 1 .030 X 1.125 CONTACT TIP EACH 131 0 053-09 H088D4
MIL 000068 1 .035 X 1.125 CONTACT TIP EA 0 10 072-07 A
MIL 000068 1 .035 X 1.125 CONTACT TIP EA 327 0 053-10 H088D5
MIL 000069 1 .045 X 1.125 CONTACT TIP EA 0 6 072-09 A
MIL 000069 1 .045 X 1.125 CONTACT TIP EA 176 0 053-11 H088D6
this is the actual data I am working with. lets call it file 'data'. the numbers line up perfectly on the command line.

here is my script
Quote:
gawk '
{ FIELDWIDTHS = " 58 10 11 8 " }

$2 != $3
{ sum+=$2 }
{ print sum }' $1
I set fieldwidths as there are random spaces that mess up the process.

so $1 = all the detail up to the first number, $2 is on number and $3 is the other. $4 is the junk on the end.

I run this like
./script data

my output
Quote:
0
MIL 000067 1 .030 X 1.125 CONTACT TIP EACH 0 2 072-08 A
0
MIL 000067 1 .030 X 1.125 CONTACT TIP EACH 131 0 053-09 H088D4
131
MIL 000068 1 .035 X 1.125 CONTACT TIP EA 0 10 072-07 A
131
MIL 000068 1 .035 X 1.125 CONTACT TIP EA 327 0 053-10 H088D5
458
MIL 000069 1 .045 X 1.125 CONTACT TIP EA 0 6 072-09 A
458
MIL 000069 1 .045 X 1.125 CONTACT TIP EA 176 0 053-11 H088D6
634
here is the output. I see that it is adding up column $2 and printing it after the line but it does not reset the number on part number changes. I took the END out as I wanted the numbers after each part number.

How do I have the sum reset after each change in part number? (change in $1)

also, what is the appropriate way to sum both $2 and $3?

thanks!
 

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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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