adding BayesNet#3

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AllenDowney:masterfrom

Commits on Oct 3, 2013

adding BayesNet
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Commits on Oct 4, 2013

included negative causation and generalized to include heterogenous causal effects
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included the possibility to add independent variables that are not causes of other variables. However, right now, those independent variables have to be added, using add_nodes, before edges are add…
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Commits on Oct 5, 2013

fixed some bugs and cleaned up code.
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some minor fixes.
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Commits on Oct 8, 2013

Now it integrates over effect parameters, based on a pmf that is fed into the BayesNet object. The default is a beta distribution with alpha=beta=2.
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