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package edu.cmu.tetrad.bayes;

import edu.cmu.tetrad.graph.Graph;

/**
 * Interface for a Bayes updating algorithm that's capable of doing
 * manipulation. In general, manipulating a variable X will eliminate edges into
 * X, so the updating operation on the manipulated model will produce different
 * results.
 *
 * @author josephramsey
 */
public interface ManipulatingBayesUpdater extends BayesUpdater {
    long serialVersionUID = 23L;

    /**
     * @return the Bayes instantiated model after manipulations have been
     * applied.
     */
    BayesIm getManipulatedBayesIm();

    /**
     * @return the graph for the manipulated BayesIm.
     */
    Graph getManipulatedGraph();

    /**
     * @return a defensive copy of the evidence.
     */
    Evidence getEvidence();

    /**
     * Sets new evidence for the updater. Once this is called, old updating
     * results should not longer be available.
     */
    void setEvidence(Evidence evidence);

    /**
     * @return the updated Bayes IM--that is, the Bayes IM in which all
     * probabilities of variables conditional on their parents have been
     * updated.
     */
    BayesIm getUpdatedBayesIm();

    /**
     * @return P(variable = category | evidence) where evidence is getEvidence().
     */
    double getMarginal(int variable, int category);

}





