[R] newbie question: polr and glm.control

[Prof Brian Ripley]

On Wed, 6 Feb 2002, Boryeu Mao wrote:

> I'm running polr() and getting warning messages from glm.fit().  It seems
> reasonable to use glm.control() to turn on the trace and follow what
> glm.fit() does when called by polr(); or is it?
>
> glm.control(maxit=10, trace=TRUE)
> polr(act~., data=mm)
>
> The glm.control() sets the trace TRUE, but there's no change in the output
> from polr().

No, it doesn't: it returns an object to be passed to glm.

glm.fit is only used in polr to find starting values, so specify `start'
to polr.

polr is in package MASS, BTW.

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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