NewtonRootFinderDirectionFunction.java

/**
 * Copyright (C) 2009 - present by OpenGamma Inc. and the OpenGamma group of companies
 * 
 * Please see distribution for license.
 */
package com.opengamma.analytics.math.rootfinding.newton;

import com.opengamma.analytics.math.matrix.DoubleMatrix1D;
import com.opengamma.analytics.math.matrix.DoubleMatrix2D;

/**
 * 
 */
public interface NewtonRootFinderDirectionFunction {

  DoubleMatrix1D getDirection(DoubleMatrix2D estimate, DoubleMatrix1D y);
}