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Diffstat (limited to 'src/main/java/org/apache/commons/math3/analysis/function/Exp.java')
-rw-r--r-- | src/main/java/org/apache/commons/math3/analysis/function/Exp.java | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/src/main/java/org/apache/commons/math3/analysis/function/Exp.java b/src/main/java/org/apache/commons/math3/analysis/function/Exp.java new file mode 100644 index 0000000..f656712 --- /dev/null +++ b/src/main/java/org/apache/commons/math3/analysis/function/Exp.java @@ -0,0 +1,53 @@ +/* + * 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.function; + +import org.apache.commons.math3.analysis.FunctionUtils; +import org.apache.commons.math3.analysis.UnivariateFunction; +import org.apache.commons.math3.analysis.DifferentiableUnivariateFunction; +import org.apache.commons.math3.analysis.differentiation.DerivativeStructure; +import org.apache.commons.math3.analysis.differentiation.UnivariateDifferentiableFunction; +import org.apache.commons.math3.util.FastMath; + +/** + * Exponential function. + * + * @since 3.0 + */ +public class Exp implements UnivariateDifferentiableFunction, DifferentiableUnivariateFunction { + /** {@inheritDoc} */ + public double value(double x) { + return FastMath.exp(x); + } + + /** {@inheritDoc} + * @deprecated as of 3.1, replaced by {@link #value(DerivativeStructure)} + */ + @Deprecated + public UnivariateFunction derivative() { + return FunctionUtils.toDifferentiableUnivariateFunction(this).derivative(); + } + + /** {@inheritDoc} + * @since 3.1 + */ + public DerivativeStructure value(final DerivativeStructure t) { + return t.exp(); + } + +} |