1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18 package org.apache.commons.math3.analysis.function; 19 20 import org.apache.commons.math3.analysis.FunctionUtils; 21 import org.apache.commons.math3.analysis.UnivariateFunction; 22 import org.apache.commons.math3.analysis.DifferentiableUnivariateFunction; 23 import org.apache.commons.math3.analysis.differentiation.DerivativeStructure; 24 import org.apache.commons.math3.analysis.differentiation.UnivariateDifferentiableFunction; 25 import org.apache.commons.math3.util.FastMath; 26 27 /** 28 * Base 10 logarithm function. 29 * 30 * @since 3.0 31 */ 32 public class Log10 implements UnivariateDifferentiableFunction, DifferentiableUnivariateFunction { 33 34 /** {@inheritDoc} */ value(double x)35 public double value(double x) { 36 return FastMath.log10(x); 37 } 38 39 /** {@inheritDoc} 40 * @deprecated as of 3.1, replaced by {@link #value(DerivativeStructure)} 41 */ 42 @Deprecated derivative()43 public UnivariateFunction derivative() { 44 return FunctionUtils.toDifferentiableUnivariateFunction(this).derivative(); 45 } 46 47 /** {@inheritDoc} 48 * @since 3.1 49 */ value(final DerivativeStructure t)50 public DerivativeStructure value(final DerivativeStructure t) { 51 return t.log10(); 52 } 53 54 } 55