1Fsdb::Filter::dbrowaccuUmsuelratCeo(n3t)ributed Perl DocFusmdebn:t:aFtiilotner::dbrowaccumulate(3)
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NAME

6       dbrowaccumulate - compute a running sum of a column
7

SYNOPSIS

9       dbrowaccumulate [-C increment_constant] [-I initial_value] [-c
10       increment_column] [-N new_column_name]
11

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.
15
16       What to accumulate is specified by "-c" or "-C".
17
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:
34
35       -d  Enable debugging output.
36
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.
41
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.
54
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
70
71   Command:
72           cat DATA/kitrace.fsdb | dbrowaccumulate -c diff
73
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
86

SEE ALSO

88       Fsdb, dbrowenumerate.
89

CLASS FUNCTIONS

91   new
92           $filter = new Fsdb::Filter::dbrowaccumulate(@arguments);
93
94       Create a new dbrowaccumulate object, taking command-line arguments.
95
96   set_defaults
97           $filter->set_defaults();
98
99       Internal: set up defaults.
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101   parse_options
102           $filter->parse_options(@ARGV);
103
104       Internal: parse command-line arguments.
105
106   setup
107           $filter->setup();
108
109       Internal: setup, parse headers.
110
111   run
112           $filter->run();
113
114       Internal: run over each rows.
115

117       Copyright (C) 1991-2022 by John Heidemann <johnh@isi.edu>
118
119       This program is distributed under terms of the GNU general public
120       license, version 2.  See the file COPYING with the distribution for
121       details.
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125perl v5.36.0                      2022-11-22  Fsdb::Filter::dbrowaccumulate(3)
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