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The Apache Commons Math project is a library of lightweight, self-contained mathematics and statistics components addressing the most common practical problems not immediately available in the Java programming language or commons-lang.
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.commons.math3.analysis;
/**
* An interface representing a real function that depends on one independent
* variable plus some extra parameters.
*
* @since 3.0
*/
public interface ParametricUnivariateFunction {
/**
* Compute the value of the function.
*
* @param x Point for which the function value should be computed.
* @param parameters Function parameters.
* @return the value.
*/
double value(double x, double ... parameters);
/**
* Compute the gradient of the function with respect to its parameters.
*
* @param x Point for which the function value should be computed.
* @param parameters Function parameters.
* @return the value.
*/
double[] gradient(double x, double ... parameters);
}