Message-ID: <50EFC3C6.3060303@stats.ox.ac.uk>
Date: 2013-01-11T07:48:22Z
From: Brian Ripley
Subject: polr model, out-of-sample probabilities
In-Reply-To: <CAEa3xdyBYBawr8U7M96ssLMvAzPFcULBkFydPPzHSyyRR46KnQ@mail.gmail.com>
On 11/01/2013 01:59, Alphan Kirayoglu wrote:
> Hi,
>
> Is there a function to calculate probabilities for new out-of-sample data
> once we fit a model using the in-sample data?
>
> predict(model, newdata=... ) seems to require the new data to be the same
> size as the original data used to fit the model.
It does not, so why do you assume so?
> In short, I would like to fit a model and then pass out-of-sample data to
> calculate probabilities.
That is what predict() is for.
Your subject line says 'polr model'. Perhaps this was about my package
MASS, but in any case please talk to the credit-where-credit-is-due
department.
And you could have seen this with a simple modification of the example
on the help page for MASS::polr ....
>
> Regards,
> Alp
>
> [[alternative HTML version deleted]]
>
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--
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 272866 (PA)
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