private boolean paramInBounds(Edge edge, double newValue) {
edgeParameters.put(edge, newValue);
Map<Node, Double> errorVariances = new HashMap<Node, Double>();
for (Node node : semPm.getVariableNodes()) {
Node error = semGraph.getExogenous(node);
double d2 = calculateErrorVarianceFromParams(error);
if (Double.isNaN(d2)) {
return false;
}
errorVariances.put(error, d2);
}
if (!MatrixUtils.isPositiveDefinite(errCovar(errorVariances))) {
return false;
}
return true;
}
/**
* @return For compatibility only. Returns the variable means of the model. These are always zero,
* since this is a standardized model. THESE ARE ALSO NOT PARAMETERS OF THE MODEL. ONLY THE
* COEFFICIENTS ARE PARAMETERS.
*/
public double[] means() {
return new double[semPm.getVariableNodes().size()];
}
/** @return the list of variable nodes of the model, in order. */
public List<Node> getVariableNodes() {
return semPm.getVariableNodes();
}