opencog-dev team mailing list archive

["Joel Pitt" <joel.pitt@xxxxxxxxx>]

Hi Trent

On Mon, Jun 9, 2008 at 4:38 PM, Trent Waddington
<trent.waddington@xxxxxxxxx> wrote:
> Can someone please document SimpleTruthValue and the subclasses.
> IndefiniteTruthValue.h has a comment:
>
>   float confidenceLevel;  // referred as "b" in the paper
>
> what paper?  If I can get it then I'll happily change all these other
> variables to have descriptive names.  Perhaps it might even shine some
> light on why getCount() returns a float.

These are related to the indefinite interval probabilities that are an
integral part of probabilistic logic networks (PLN).

A book by Ben is appearing soon, and there are several papers that he
may be able to forward to you.

I'm due to start working on PLN later this week or early next, and
Cesar (a GSoC student) is possibly going to start properly
implementing the Indefinite truth value mechanics soon. I'll try and
make the TruthValue docs more clear during this time.

RE: confidenceLevel. This is the chance that after k more observations
(k is usually a system or inference parameter) the mean of these
TruthValue strength value will lie within the Indefinite probability
interval [L U]. Will have to leave it to someone else to answer why
getCount returns a float however as I haven't started digging into
that code yet...

J