reseqtable - resequence a numeric column in a table to a monotonicly ascending sequence

SYNOPSIS

reseqtale column

Assign new values to a column in a monotonicly ascending sequence of integers. This is reminescant of the clasic BASIC command "renumber".

EXAMPLES

Fix up the "Number" column after selecting some records.

        john@panic: row "X > 4" < input | reseqtable Number

reseqtalbe is a shell script which uses compute:

#!/bin/sh
#
# reseqtable
#
# Starbase Data Tables  - An Ascii Database for UNIX
#
#   copyright 1991, 1993, 1995, 1999 John B. Roll jr.
#   
PATH=.:/bin:/usr/bin
export PATH

 if [ $# != 1 ] ; then
        echo "reseqtable <column>" 1>&2
        exit 1
 fi

 Column=$1

 compute -D "  __ST=$Column
                if ( $Column==__SN ) $Column =   __NS
                else                 $Column = ++__NS
                __SN=__ST"