R help - Feb 2002 - newbie question: polr and glm.control

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().

Many thanks in advance for any help/pointers.
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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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