1DBROWACCUMULATE(1)    User Contributed Perl Documentation   DBROWACCUMULATE(1)
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NAME

6       dbrowaccumulate - compute a running sum of a column
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SYNOPSIS

9       dbrowaccumulate [-C increment_constant] [-I initial_value] [-c
10       increment_column] [-N new_column_name]
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DESCRIPTION

13       Compute a running sum over a column of data, or of a constant
14       incremented per row, perhaps to generate a cumulative distribution.
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16       What to accumulate is specified by "-c" or "-C".
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18       The new column is named by the "-N" argument, defaulting to "accum".
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OPTIONS

21       -c or --column COLUMN
22           Accumulate values from the given COLUMN.  No default.
23
24       -C or --constant K
25           Accumulate the given constant K for each row of input.  No default.
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27       -I or --initial-value I
28           Start accumulation at value I.  Defaults to zero.
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30       -N or --new-name N
31           Name the new column N.  Defaults to "accum".
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33       This module also supports the standard fsdb options:
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35       -d  Enable debugging output.
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37       -i or --input InputSource
38           Read from InputSource, typically a file name, or "-" for standard
39           input, or (if in Perl) a IO::Handle, Fsdb::IO or Fsdb::BoundedQueue
40           objects.
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42       -o or --output OutputDestination
43           Write to OutputDestination, typically a file name, or "-" for
44           standard output, or (if in Perl) a IO::Handle, Fsdb::IO or
45           Fsdb::BoundedQueue objects.
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47       --autorun or --noautorun
48           By default, programs process automatically, but Fsdb::Filter
49           objects in Perl do not run until you invoke the run() method.  The
50           "--(no)autorun" option controls that behavior within Perl.
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52       --help
53           Show help.
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55       --man
56           Show full manual.
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SAMPLE USAGE

59   Input:
60           #fsdb      diff
61           0.0
62           00.000938
63           00.001611
64           00.001736
65           00.002006
66           00.002049
67           #  | /home/johnh/BIN/DB/dbrow
68           #  | /home/johnh/BIN/DB/dbcol diff
69           #  | dbsort diff
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71   Command:
72           cat DATA/kitrace.fsdb | dbrowaccumulate -c diff
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74   Output:
75           #fsdb      diff    accum
76           0.0     0
77           00.000938       .000938
78           00.001611       .002549
79           00.001736       .004285
80           00.002006       .006291
81           00.002049       .00834
82           #  | /home/johnh/BIN/DB/dbrow
83           #  | /home/johnh/BIN/DB/dbcol diff
84           #  | dbsort diff
85           #  | /home/johnh/BIN/DB/dbrowaccumulate diff
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SEE ALSO

88       Fsdb, dbrowenumerate.
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91       Copyright (C) 1991-2018 by John Heidemann <johnh@isi.edu>
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93       This program is distributed under terms of the GNU general public
94       license, version 2.  See the file COPYING with the distribution for
95       details.
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99perl v5.30.0                      2019-09-19                DBROWACCUMULATE(1)
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