1 - Oregon State University

Probabilistic Graphical Models (3) How should the conditionalprobability distributions berepresented? Conditional Probability Tables(CPTs) with one parameter foreach combination of values:X 1 X 2 Y 1 P(Y 1 |X 1 , X 2 )0 0 0 α0 0 1 1 − α0 1 0 β0 1 1 1 − β1 0 0 γ1 0 1 1 − γ1 1 0 δ1 1 1 1 − δ Log-linear models log P Y 1=1 X 1 ,X 2P Y 1 =0 X 1 ,X 2= α′ + β′ ⋅ I[X 1 = 1] + γ′ ⋅ I[X 2 = 1]6TAAI 201111/11/2011