/**
* Updates the proposal parameter, based on the target acceptance probability This method relies
* on the proposal parameter being a decreasing function of acceptance probability.
*
* @param op The operator
* @param logr
*/
private void coerceAcceptanceProbability(CoercableMCMCOperator op, double logr) {
if (isCoercable(op)) {
final double p = op.getCoercableParameter();
final double i = schedule.getOptimizationTransform(MCMCOperator.Utils.getOperationCount(op));
final double target = op.getTargetAcceptanceProbability();
final double newp = p + ((1.0 / (i + 1.0)) * (Math.exp(logr) - target));
if (newp > -Double.MAX_VALUE && newp < Double.MAX_VALUE) {
op.setCoercableParameter(newp);
}
}
}
private boolean isCoercable(CoercableMCMCOperator op) {
return op.getMode() == CoercionMode.COERCION_ON
|| (op.getMode() != CoercionMode.COERCION_OFF && useCoercion);
}