MathGroup Archive: May 2008 [00898]

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Lorentzian on a baseline

To: mathgroup at smc.vnet.net
Subject: [mg89178] Lorentzian on a baseline
From: fred.engles at gmail.com
Date: Wed, 28 May 2008 04:45:43 -0400 (EDT)

I'm trying to fit a Lorentzian subtracted from a constant baseline,
using findfit.

 FindFit[rawdata, m1 - m2/((x - m3)^2 + m2^2), {m1, m2, {m3, 250}}, x,
  MaxIterations -> 10000]

Isn't working - either a totally flat horizantal line, or the
subtracted 'Lorentzian' looks almost delta-function sharp. Help?
Thanks!

P.S. Does Experimental Data Analyst work with 6.0.1 (Mac)?

Follow-Ups:
- Re: Lorentzian on a baseline
  - From: Darren Glosemeyer <darreng@wolfram.com>
- Re: Lorentzian on a baseline
  - From: Sseziwa Mukasa <mukasa@jeol.com>

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