[computer-go] ELO Ratings of move pattern

[Álvaro Begué]

On Dec 12, 2007 3:05 PM, Jason House <jason.james.house at gmail.com> wrote:

>
>
> On Dec 12, 2007 2:59 PM, Rémi Coulom <Remi.Coulom at univ-lille3.fr> wrote:
>
> > > Do you mean a plot of the prediction rate with only the
> > > gamma of interest varying?
> >
> > No the prediction rate, but the probability of the training data. More
> > precisely, the logarithm of that probability.
>
>
> I still don't know what you mean by this.
>

He probably should use the word "likelihood" instead of "probability".
http://en.wikipedia.org/wiki/Likelihood_function


>
>
>
> > If you have P(x)=A*exp(-x²/2sigma²), then log(P(x))=log(A)-x²/2sigma²,
> > and d²(log(P(x)))/dx²=-1/sigma². This means that, for a Gaussian
> > probability distribution, the second-order derivative directly gives the
> > variance. For distributions that look similar to a Gaussian, the
> > second-order derivative is a good approximation.
>
>
> This part I understand
>
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