DBROWACCUMULATE(1)

NAME
dbrowaccumulate - compute a running sum of a column

SYNOPSIS
dbrowaccumulate [-C increment_constant] [-I initial_value] [-c increment_column] [-N new_column_name]

DESCRIPTION
Compute a running sum over a column of data, or of a constant incremented per row, perhaps to generate a cumulative distribution.

What to accumulate is specified by "-c" or "-C".

The new column is named by the "-N" argument, defaulting to "accum".

OPTIONS

-c or --column COLUMN
    Accumulate values from the given COLUMN. No default.

-C or --constant K
    Accumulate the given constant K for each row of input. No default.

-I or --initial-value I
    Start accumulation at value I. Defaults to zero.

-N or --new-name N
    Name the new column N. Defaults to "accum".

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      diff
    0.0
    00.000938
    00.001611
    00.001736
    00.002006
    00.002049
    #  | /home/johnh/BIN/DB/dbrow
    #  | /home/johnh/BIN/DB/dbcol diff
    #  | dbsort diff

  Command:
    cat DATA/kitrace.fsdb | dbrowaccumulate -c diff

  Output:
    #fsdb      diff    accum
    0.0     0
    00.000938       .000938
    00.001611       .002549
    00.001736       .004285
    00.002006       .006291
    00.002049       .00834
    #  | /home/johnh/BIN/DB/dbrow
    #  | /home/johnh/BIN/DB/dbcol diff
    #  | dbsort diff
    #  | /home/johnh/BIN/DB/dbrowaccumulate diff

SEE ALSO
Fsdb, dbrowenumerate.

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.