Re: errors on parameters from NonlinearRegress
- To: mathgroup at smc.vnet.net
- Subject: [mg60739] Re: errors on parameters from NonlinearRegress
- From: Antti Penttilä@smc.vnet.net
- Date: Tue, 27 Sep 2005 03:45:12 -0400 (EDT)
- Organization: University of Helsinki
- References: <dh2u46$dbd$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
contact at dantimatter.com wrote:
> Hello all,
>
> If I have a two-parameter fit, does anyone know a way to get
> independent error bars on the two best-fit parameters produced by
> NonlinearRegress?
The NonlinearRegress reports the ParameterCITable. The Confidence intervals (error bars) are in that table in the column 'CI'. Usually these error bars are not independent because there is correlation between the model parameters, seen e.g. in AsymptoticCorrelationMatrix that the function also prints.
Regards,
Antti
--
Antti Penttilä Antti.I.Penttila at helsinki.fi.removethis
Researcher Observatory
tel. +358 50 5240968 00014 University of Helsinki