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linreg - six linear regressions
linreg [parameter=value]
linreg computes the slope (a) and intercept coefficients (b)
for for OLS(Y/X) (1), OLS(X/Y) (2), OLS bisector(3)
, orthogonal(4)
, reduced
major axis (5)
and mean OLS (6)
methods. The dispersions are returned in
the arrays siga and sigb.
The dispersions for OLS are the general form provided
by T. Isobe, E. D. Feigelson, M. G. Akritas and G. J. Babu, Ap.J. 364, 104. (1990)
mean OLS is 0.5*[OLS(X/Y) + OLS(Y/X)]
The following parameters
are recognized in any order if the keyword is also given:
- in=
- Input ascii
table
- xcol=
- Column for X coordinates
- ycol=
- Column for Y coordinates
- mode=
- Output mode (0=all, 1..6=various methods
- maxline=
- Maximum size
of columns
linreg(3NEMO)
, fitexy(3NEMO)
, gaussfit(1NEMO)
,
tablsqfit(1NEMO)
T. Isobe, E. D. Feigelson, M. G. Akritas and G. J. Babu, (1990)
Ap.J. 364, 104.
Pogge and Peterson, (1992)
A.J. 103, 1084 - Appendix
Akritas, Michael G.; Bershady, Matthew A. (1996)
Ap.J. 470,706.
http://www.astro.psu.edu/users/edf/research/stat.html (Astrostatistics)
Reilly, Reilly & Keeler 1993, Applied Statistics, vol. 42
Britt & Luecke 1973, Technometrics, vol. 15
Jeffreys 1980, ApJ, 85, 177
https://arxiv.org/abs/1704.05466
hyperfit: https://hyperfit.readthedocs.io/en/latest/
Peter Teuben
23-May-96 Created PJT
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