61 lines
1.9 KiB
C++
61 lines
1.9 KiB
C++
/* ----------------------------------------------------------------------------
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* GTSAM Copyright 2010, Georgia Tech Research Corporation,
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* Atlanta, Georgia 30332-0415
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* All Rights Reserved
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* Authors: Frank Dellaert, et al. (see THANKS for the full author list)
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* See LICENSE for the license information
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* -------------------------------------------------------------------------- */
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/*
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* AsiaExample.h
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*
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* @date Jan, 2025
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* @author Frank Dellaert
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*/
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#include <gtsam/discrete/DiscreteBayesNet.h>
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#include <gtsam/inference/Symbol.h>
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namespace gtsam {
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namespace asia_example {
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static const Key D = Symbol('D', 1), X = Symbol('X', 2), E = Symbol('E', 3),
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B = Symbol('B', 4), L = Symbol('L', 5), T = Symbol('T', 6),
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S = Symbol('S', 7), A = Symbol('A', 8);
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static const DiscreteKey Dyspnea(D, 2), XRay(X, 2), Either(E, 2),
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Bronchitis(B, 2), LungCancer(L, 2), Tuberculosis(T, 2), Smoking(S, 2),
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Asia(A, 2);
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// Function to construct the incomplete Asia example
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DiscreteBayesNet createPriors() {
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DiscreteBayesNet priors;
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priors.add(Smoking % "50/50");
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priors.add(Asia, "99/1");
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return priors;
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}
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// Function to construct the incomplete Asia example
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DiscreteBayesNet createFragment() {
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DiscreteBayesNet fragment;
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fragment.add((Either | Tuberculosis, LungCancer) = "F T T T");
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fragment.add(LungCancer | Smoking = "99/1 90/10");
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fragment.add(Tuberculosis | Asia = "99/1 95/5");
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for (const auto& factor : createPriors()) fragment.push_back(factor);
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return fragment;
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}
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// Function to construct the Asia example
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DiscreteBayesNet createAsiaExample() {
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DiscreteBayesNet asia;
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asia.add((Dyspnea | Either, Bronchitis) = "9/1 2/8 3/7 1/9");
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asia.add(XRay | Either = "95/5 2/98");
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asia.add(Bronchitis | Smoking = "70/30 40/60");
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for (const auto& factor : createFragment()) asia.push_back(factor);
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return asia;
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}
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} // namespace asia_example
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} // namespace gtsam
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