Probably you are looking for EIV (errors-in-variables) or ME
(measurement errors) models.
"simex" is a possible package which needs to know the error variance..
Also RSiteSearch() may be helpful..
hope this helps,
vito
kpal ha scritto:
One of the assumptions, on which the (General) Linear Modelling is
based is that the response variable is measured with some
uncertainties (or weighted), but the explanatory variables are fixed.
Is it possible to extend the model by assigning the weights to the
explanatory variables as well? Is there a package for doing such a
model fit?
Thanks
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====================================
Vito M.R. Muggeo
Dip.to Sc Statist e Matem `Vianelli'
Università di Palermo
viale delle Scienze, edificio 13
90128 Palermo - ITALY
tel: 091 6626240
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http://dssm.unipa.it/vmuggeo
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
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