dbrowaccumulate - compute a running sum of a column

NOTE: this page was directly converted from the perl FSDB manual pages from FSDB version 3.1

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.