Soft-Evidence

[7jc...@gmail.com]

Hi there,

I am wondering, if setting soft-evidence is possible with libDAI. I want to set a fixed evidence of uncertainty (e.g. P(A=0)=0.2, P(A=1)=0.8)). Up to now, I only found the clamp() method, which can set hard-evidence.
I've also read about the possibility of adding an auxiliary child-knot, which can be set with a hard-evidence and thus sets the desired soft-evidence to the parent-knot (by first calculating the needed CPT of the child).

What do you think is the best way of achieving this? Is there anything implemented already?

Thanks!

[danielk...@googlemail.com]

Any answer on this question? Is it possible to set soft or virtual evidence in libDAI and use the inference algorithms on these?

Thanks,
Daniel

[Joris Mooij]

Hi Daniel,

there's no built-in support for that, but you can always introduce an auxiliary
factor into the factor graph that allows the soft-evidence to be specified.

Best, Joris

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[danielk...@googlemail.com]

Hello Joris,
thanks for your fast response and the clarification.

Cheers,
Daniel