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Re: Leasqr matrix singular to machine precision

From: Przemek Klosowski
Subject: Re: Leasqr matrix singular to machine precision
Date: Mon, 25 Feb 2008 14:25:55 -0500 (EST)

   For the weight on some points I thought of it but as the values I get 
   are all of the same importance I think fitting with wt = (1) is a 
   correct guess.

I would caution against it---every target point has its own
experimental, or systematic, or other kind of error, and those errors
are rarely the same for all points. For instance, if the points were
calculated in a counting experiment, i.e. they represent counts per
some unit of time, or are a result of a monte carlo simulation, their
error will likely be proportional to the square root of the value.


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