DBCOLCOPYLAST(1)

NAME
dbcolcopylast - create new columns that are copies of prior columns

SYNOPSIS
    dbcolcopylast [-e EMPTY] [column...]

DESCRIPTION
For each COLUMN, create a new column copylast_COLUMN that is the last value for that column---that is, the value of that column from the row before.

OPTIONS

-e EmptyValue or --empty
    Specify the value newly created columns get.

This module also supports the standard fsdb options:

-d  Enable debugging output.

-i or --input InputSource
    Read from InputSource, typically a file name, or "-" for standard input, or (if in Perl) a IO::Handle, Fsdb::IO or Fsdb::BoundedQueue objects.

-o or --output OutputDestination
    Write to OutputDestination, typically a file name, or "-" for standard output, or (if in Perl) a IO::Handle, Fsdb::IO or Fsdb::BoundedQueue objects.

--autorun or --noautorun
    By default, programs process automatically, but Fsdb::Filter objects in Perl do not run until you invoke the run() method. The "--(no)autorun" option controls that behavior within Perl.

--help
    Show help.

--man
    Show full manual.

SAMPLE USAGE

  Input:
    #fsdb test
    a
    b

  Command:
    cat data.fsdb | dbcolcopylast foo

  Output:
    #fsdb      test    foo
    a       -
    b       -

SEE ALSO
Fsdb.

AUTHOR and COPYRIGHT
Copyright (C) 1991-2018 by John Heidemann <johnh@isi.edu>

This program is distributed under terms of the GNU general public license, version 2. See the file COPYING with the distribution for details.