1Fsdb::Filter::dbcolsregUrseesrsiCoonn(t3r)ibuted Perl DoFcsudmbe:n:tFaitlitoenr::dbcolsregression(3)
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NAME

6       dbcolsregression - compute linear regression between two columns
7

SYNOPSIS

9           dbcolsregression  [-a] column1 column2
10

DESCRIPTION

12       Compute linear regression over "column1" and "column2".  Outputs slope,
13       intercept, and correlation coefficient.
14

OPTIONS

16       -a or --include-non-numeric
17           Compute stats over all records (treat non-numeric records as zero
18           rather than just ignoring them).
19
20       -f FORMAT or --format FORMAT
21           Specify a printf(3)-style format for output statistics.  Defaults
22           to "%.5g".
23
24       This module also supports the standard fsdb options:
25
26       -d  Enable debugging output.
27
28       -i or --input InputSource
29           Read from InputSource, typically a file name, or "-" for standard
30           input, or (if in Perl) a IO::Handle, Fsdb::IO or Fsdb::BoundedQueue
31           objects.
32
33       -o or --output OutputDestination
34           Write to OutputDestination, typically a file name, or "-" for
35           standard output, or (if in Perl) a IO::Handle, Fsdb::IO or
36           Fsdb::BoundedQueue objects.
37
38       --autorun or --noautorun
39           By default, programs process automatically, but Fsdb::Filter
40           objects in Perl do not run until you invoke the run() method.  The
41           "--(no)autorun" option controls that behavior within Perl.
42
43       --help
44           Show help.
45
46       --man
47           Show full manual.
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SAMPLE USAGE

50   Input:
51           #fsdb x     y
52           160 126
53           180 103
54           200 82
55           220 75
56           240 82
57           260 40
58           280 20
59
60   Command:
61           cat DATA/xy.fsdb | dbcolsregression x y | dblistize
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63   Output:
64           #fsdb -R C slope:d intercept:d confcoeff:d n:q
65           slope:     -0.79286
66           intercept: 249.86
67           confcoeff: -0.95426
68           n:         7
69
70           #  | dbcolsregression x y
71           #                confidence intervals assume normal distribution and small n.
72           #  | dblistize
73
74       Sample data from
75       <http://people.hofstra.edu/faculty/Stefan_Waner/RealWorld/calctopic1/regression.html>
76       by Stefan Waner and Steven R. Costenoble.
77

SEE ALSO

79       dbcolstats, dbcolscorrelate, Fsdb.
80

CLASS FUNCTIONS

82   new
83           $filter = new Fsdb::Filter::dbcolsregression(@arguments);
84
85       Create a new dbcolsregression object, taking command-line arguments.
86
87   set_defaults
88           $filter->set_defaults();
89
90       Internal: set up defaults.
91
92   parse_options
93           $filter->parse_options(@ARGV);
94
95       Internal: parse command-line arguments.
96
97   setup
98           $filter->setup();
99
100       Internal: setup, parse headers.
101
102   run
103           $filter->run();
104
105       Internal: run over each rows.
106

108       Copyright (C) 1997-2022 by John Heidemann <johnh@isi.edu>
109
110       This program is distributed under terms of the GNU general public
111       license, version 2.  See the file COPYING with the distribution for
112       details.
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116perl v5.36.0                      2022-11-22 Fsdb::Filter::dbcolsregression(3)
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