dbcoldefine - define the columns of a plain text file to make it an Fsdb ====================================================================== *NOTE: this page was directly converted from the perl FSDB manual pages from FSDB version 3.1* SYNOPSIS -------- dbcoldefine [-F x] [column...] DESCRIPTION ----------- This program writes a new header before the data with the specified column names. It does *not* do any validation of the data contents; it is up to the user to verify that, other than the header, the input datastream is a correctly formatted Fsdb file. OPTIONS ------- -F or --fs or --fieldseparator s Specify the field separator. --header H Give the columns and field separator as a full Fsdb header (including ``#fsdb``). Can only be used alone, not with other specifications. 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: ------ 102400 4937974.964736 102400 4585247.875904 102400 5098141.207123 Command: -------- cat DATA/http_bandwidth \| dbcoldefine size bw Output: ------- #fsdb size bw 102400 4937974.964736 102400 4585247.875904 102400 5098141.207123 # \| dbcoldefine size bw SEE ALSO -------- Fsdb. dbfilestripcomments AUTHOR and COPYRIGHT -------------------- Copyright (C) 1991-2016 by John Heidemann This program is distributed under terms of the GNU general public license, version 2. See the file COPYING with the distribution for details.