Examples with GeneralizedSemPm edu.cmu.tetrad.sem.GeneralizedSemPm used on opensource projects

Example 11 with GeneralizedSemPm

use of edu.cmu.tetrad.sem.GeneralizedSemPm in project tetrad by cmu-phil.

the class SpecialDataClark method simulate.

private DataSet simulate(Graph graph, Parameters parameters) {
    int N = parameters.getInt("sampleSize");
    try {
        GeneralizedSemPm pm = new GeneralizedSemPm(graph);
        Graph g = pm.getGraph();
        for (String p : pm.getParameters()) {
            double coef = RandomUtil.getInstance().nextUniform(0.3, 0.6);
            if (RandomUtil.getInstance().nextDouble() < 0.5) {
                coef *= -1;
            }
            pm.setParameterExpression(p, "" + coef);
        }
        for (Node x : g.getNodes()) {
            if (!(x.getNodeType() == NodeType.ERROR)) {
                String error;
                double s = RandomUtil.getInstance().nextUniform(.1, .4);
                double f = getF(s, N);
                if (s > 0) {
                    error = "pow(Uniform(0, 1), " + (1.0 + f) + ")";
                } else {
                    error = "-pow(Uniform(0, 1), " + (1.0 + f) + ")";
                }
                pm.setNodeExpression(pm.getErrorNode(x), error);
            }
        }
        GeneralizedSemIm im = new GeneralizedSemIm(pm);
        return im.simulateData(N, false);
    } catch (Exception e) {
        throw new IllegalArgumentException("Sorry, I couldn't simulate from that Bayes IM; perhaps not all of\n" + "the parameters have been specified.");
    }
}