dbcolsregression - compute linear regression between two columns

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

SYNOPSIS

dbcolsregression [-a] column1 column2

DESCRIPTION

Compute linear regression over column1 and column2. Outputs slope, intercept, and correlation coefficient.

OPTIONS

-a or –include-non-numeric

Compute stats over all records (treat non-numeric records as zero rather than just ignoring them).

-f FORMAT or –format FORMAT

Specify a printf (3)-style format for output statistics. Defaults to %.5g.

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 x y 160 126 180 103 200 82 220 75 240 82 260 40 280 20

Command:

cat DATA/xy.fsdb | dbcolsregression x y | dblistize

Output:

#fsdb -R C slope:d intercept:d confcoeff:d n:q slope: -0.79286 intercept: 249.86 confcoeff: -0.95426 n: 7 # | dbcolsregression x y # confidence intervals assume normal distribution and small n. # | dblistize

Sample data from <http://people.hofstra.edu/faculty/Stefan_Waner/RealWorld/calctopic1/regression.html> by Stefan Waner and Steven R. Costenoble.

SEE ALSO

dbcolstats, dbcolscorrelate, Fsdb.