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The Berkeley parser analyzes the grammatical structure of natural language using probabilistic context-free grammars (PCFGs).

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package edu.berkeley.nlp.math;

import edu.berkeley.nlp.util.Logger;

public class ExponentiatedGradientMinimizer implements GradientMinimizer {
	private final static double EPS = 1e-10;
	
	private final Normalizer normalizer;
	private final int maxIterations;
	private final double stepSizeMultiplier;
	
	public ExponentiatedGradientMinimizer(Normalizer normalizer, int maxIterations, double stepSizeMultiplier) {
		this.normalizer = normalizer;
		this.maxIterations = maxIterations;
		this.stepSizeMultiplier = stepSizeMultiplier;
	}
	
	public double[] minimize(DifferentiableFunction function, double[] initial, double tolerance, boolean project){
		return null;
	}
	
	public double[] minimize(DifferentiableFunction function, double[] initial, double tolerance) {
		double[] guess = DoubleArrays.clone(initial);
		for (int iteration=0; iteration