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Commons Math example source code file (BinaryFunction.java)
The Commons Math BinaryFunction.java source code/* * 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.math.analysis; import org.apache.commons.math.FunctionEvaluationException; /** * Base class for {@link BivariateRealFunction} that can be composed with other functions. * * @since 2.1 * @version $Revision: 924453 $ $Date: 2010-03-17 16:05:20 -0400 (Wed, 17 Mar 2010) $ */ public abstract class BinaryFunction implements BivariateRealFunction { /** The + operator method wrapped as a {@link BinaryFunction}. */ public static final BinaryFunction ADD = new BinaryFunction() { /** {@inheritDoc} */ @Override public double value(double x, double y) { return x + y; } }; /** The - operator method wrapped as a {@link BinaryFunction}. */ public static final BinaryFunction SUBTRACT = new BinaryFunction() { /** {@inheritDoc} */ @Override public double value(double x, double y) { return x - y; } }; /** The * operator method wrapped as a {@link BinaryFunction}. */ public static final BinaryFunction MULTIPLY = new BinaryFunction() { /** {@inheritDoc} */ @Override public double value(double x, double y) { return x * y; } }; /** The / operator method wrapped as a {@link BinaryFunction}. */ public static final BinaryFunction DIVIDE = new BinaryFunction() { /** {@inheritDoc} */ @Override public double value(double x, double y) { return x / y; } }; /** The {@code Math.pow} method wrapped as a {@link BinaryFunction}. */ public static final BinaryFunction POW = new BinaryFunction() { /** {@inheritDoc} */ @Override public double value(double x, double y) { return Math.pow(x, y); } }; /** The {@code Math.atan2} method wrapped as a {@link BinaryFunction}. */ public static final BinaryFunction ATAN2 = new BinaryFunction() { /** {@inheritDoc} */ @Override public double value(double x, double y) { return Math.atan2(x, y); } }; /** {@inheritDoc} */ public abstract double value(double x, double y) throws FunctionEvaluationException; /** Get a composable function by fixing the first argument of the instance. * @param fixedX fixed value of the first argument * @return a function such that {@code f.value(y) == value(fixedX, y)} */ public ComposableFunction fix1stArgument(final double fixedX) { return new ComposableFunction() { @Override /** {@inheritDoc} */ public double value(double x) throws FunctionEvaluationException { return BinaryFunction.this.value(fixedX, x); } }; } /** Get a composable function by fixing the second argument of the instance. * @param fixedY fixed value of the second argument * @return a function such that {@code f.value(x) == value(x, fixedY)} */ public ComposableFunction fix2ndArgument(final double fixedY) { return new ComposableFunction() { @Override /** {@inheritDoc} */ public double value(double x) throws FunctionEvaluationException { return BinaryFunction.this.value(x, fixedY); } }; } } Other Commons Math examples (source code examples)Here is a short list of links related to this Commons Math BinaryFunction.java source code file: |
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