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

6       dbcolsregression - compute linear regression between two columns
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SYNOPSIS

9           dbcolsregression  [-a] column1 column2
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DESCRIPTION

12       Compute linear regression over "column1" and "column2".  Outputs slope,
13       intercept, and correlation coefficient.
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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).
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20       -f FORMAT or --format FORMAT
21           Specify a printf(3)-style format for output statistics.  Defaults
22           to "%.5g".
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24       This module also supports the standard fsdb options:
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26       -d  Enable debugging output.
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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.
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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.
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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.
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43       --help
44           Show help.
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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
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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
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70           #  | dbcolsregression x y
71           #                confidence intervals assume normal distribution and small n.
72           #  | dblistize
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74       Sample data from
75       <http://people.hofstra.edu/faculty/Stefan_Waner/RealWorld/calctopic1/regression.html>
76       by Stefan Waner and Steven R. Costenoble.
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SEE ALSO

79       dbcolstats, dbcolscorrelate, Fsdb.
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82       Copyright (C) 1997-2022 by John Heidemann <johnh@isi.edu>
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84       This program is distributed under terms of the GNU general public
85       license, version 2.  See the file COPYING with the distribution for
86       details.
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90perl v5.38.0                      2023-07-20               DBCOLSREGRESSION(1)
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