dbrowaccumulate man page

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.

Info

2016-11-30 perl v5.24.0 User Contributed Perl Documentation