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Text File  |  1992-10-11  |  1.3 KB  |  31 lines
  1. Newsgroups: sci.math.stat
  2. Path: sparky!uunet!gatech!darwin.sura.net!spool.mu.edu!umn.edu!umeecs!eecs.umich.edu!ayman
  3. From: ayman@eecs.umich.edu (Ayman I. Kayssi)
  4. Subject: Re: Rational functions: a linear model?
  5. Message-ID: <1992Oct11.192921.22075@zip.eecs.umich.edu>
  6. Lines: 19
  7. Sender: news@zip.eecs.umich.edu (Mr. News)
  8. Organization: ACAL, EECS, University of Michigan, Ann Arbor
  9. References: <1992Oct11.153538.12821@zip.eecs.umich.edu> <BvyzDy.LJC@mentor.cc.purdue.edu>
  10. Date: Sun, 11 Oct 1992 19:30:15 GMT
  11.  
  12. hrubin@pop.stat.purdue.edu (Herman Rubin) wrote:
  13. >In article <1992Oct11.153538.12821@zip.eecs.umich.edu> ayman@eecs.umich.edu (Ayman I. Kayssi) writes:
  14. >>y = a0 + a1*x + ... + am*x^m + b1*(-y)*x + b2*(-y)*x^2 + ... + bn*(-y)*x^n
  15. >
  16. >If you are trying a regression on your transformed equation, the estimates
  17. >will not even be consistent because of dependent variables on the right side.
  18.  
  19.  
  20. TableCurve (from Jandel) lists the following form under *linear* equations:
  21.     
  22.     a + c x + e x^2 + ...
  23. y = ---------------------
  24.     1 + b x + d x^2 + ...
  25.  
  26. How do they (non-iteratively) calculate the parameters?
  27. --
  28. Ayman I. Kayssi                               |    ayman@eecs.umich.edu
  29. EECS Department                               +------------------------
  30. University of Michigan                        |          (313) 764-8033
  31.