RealFunction.java example

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xxl-master
/* XXL: The eXtensible and fleXible Library for data processing

Copyright (C) 2000-2011 Prof. Dr. Bernhard Seeger
                        Head of the Database Research Group
                        Department of Mathematics and Computer Science
                        University of Marburg
                        Germany

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 3 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library;  If not, see <http://www.gnu.org/licenses/>. 

    http://code.google.com/p/xxl/

*/

package xxl.core.math.functions;

/** This interface models a mathematical real-valued, one-dimensional function.
 * Classes implementing this interface need to implement an abstract method {@link #eval(double x)} that consumes
 * and returns double values.
 */

public interface RealFunction {

	/** Evaluates the real-valued function.
	 *
	 * @param x function argument
	 * @return function value
	 */
	public abstract double eval(double x);
}