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Added getAddendum() to CalculusFieldElement interface.
Fixes #349
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Lines changed: 290 additions & 46 deletions

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‎hipparchus-clustering/pom.xml‎

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@@ -23,7 +23,7 @@
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<parent>
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<groupId>org.hipparchus</groupId>
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<artifactId>hipparchus</artifactId>
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<version>3.2-SNAPSHOT</version>
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<version>4.0-SNAPSHOT</version>
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<relativePath>../hipparchus-parent</relativePath>
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</parent>
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‎hipparchus-clustering/src/changes/changes.xml‎

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@@ -49,7 +49,7 @@ If the output is not quite correct, check for invisible trailing spaces!
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<title>Hipparchus Clustering Release Notes</title>
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</properties>
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<body>
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<release version="3.2" date="TBD" description="TBD">
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<release version="4.0" date="TBD" description="TBD">
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<action dev="vincent" type="update" issue="issues/285">
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Migrated tests from JUnit 4 to JUnit 5
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</action>

‎hipparchus-core/pom.xml‎

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@@ -23,7 +23,7 @@
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<parent>
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<groupId>org.hipparchus</groupId>
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<artifactId>hipparchus</artifactId>
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<version>3.2-SNAPSHOT</version>
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<version>4.0-SNAPSHOT</version>
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<relativePath>../hipparchus-parent</relativePath>
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</parent>
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‎hipparchus-core/src/changes/changes.xml‎

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@@ -49,7 +49,10 @@ If the output is not quite correct, check for invisible trailing spaces!
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<title>Hipparchus Core Release Notes</title>
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</properties>
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<body>
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<release version="3.2" date="TBD" description="TBD">
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<release version="4.0" date="TBD" description="TBD">
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<action dev="luc" type="update" issue="issues/349">
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Added getAddendum() to CalculusFieldElement interface.
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</action>
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<action dev="luc" type="update" issue="issues/346">
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Added getLocalizedString(baseName, key, locale) with default implementation
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to Localizable interface

‎hipparchus-core/src/main/java/org/hipparchus/CalculusFieldElement.java‎

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@@ -36,6 +36,26 @@
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*/
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public interface CalculusFieldElement<T extends FieldElement<T>> extends FieldElement<T> {
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/** Get the addendum to the real value of the number.
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* <p>
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* The addendum is considered to be the part that when added back to
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* the {@link #getReal() real part} recovers the instance. This means
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* that when {@code e.getReal()} is finite (i.e. neither infinite
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* nor NaN), then {@code e.getAddendum().add(e.getReal())} is {@code e}
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* and {@code e.subtract(e.getReal())} is {@code e.getAddendum()}.
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* Beware that for non-finite numbers, these two equalities may not hold.
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* The first equality (with the addition), always holds even for infinity
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* and NaNs if the real part is independent of the addendum (this is the
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* case for all derivatives types, as well as for complex and Dfp, but it
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* is not the case for Tuple and FieldTuple). The second equality (with
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* the subtraction), generally doesn't hold for non-finite numbers, because
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* the subtraction generates NaNs.
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* </p>
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* @return real value
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* @since 4.0
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*/
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T getAddendum();
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/** Get the Archimedes constant π.
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* <p>
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* Archimedes constant is the ratio of a circle's circumference to its diameter.

‎hipparchus-core/src/main/java/org/hipparchus/analysis/differentiation/DerivativeStructure.java‎

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@@ -155,6 +155,14 @@ void setDerivativeComponent(final int index, final double value) {
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return data[index];
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}
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/** {@inheritDoc} */
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@Override
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public DerivativeStructure getAddendum() {
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final double[] addendum = data.clone();
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addendum[0] = 0;
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return new DerivativeStructure(factory, addendum);
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}
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/** Get the value part of the derivative structure.
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* @return value part of the derivative structure
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* @see #getPartialDerivative(int...)

‎hipparchus-core/src/main/java/org/hipparchus/analysis/differentiation/FieldDerivativeStructure.java‎

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@@ -25,6 +25,8 @@
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import org.hipparchus.util.MathArrays;
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import org.hipparchus.util.MathUtils;
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import java.util.Arrays;
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/** Class representing both the value and the differentials of a function.
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* <p>This class is similar to {@link DerivativeStructure} except function
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* parameters and value can be any {@link CalculusFieldElement}.</p>
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return factory;
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}
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@Override
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/** {@inheritDoc} */
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@Override
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public int getFreeParameters() {
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return getFactory().getCompiler().getFreeParameters();
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}
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@Override
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/** {@inheritDoc} */
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@Override
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public int getOrder() {
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return getFactory().getCompiler().getOrder();
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}
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return data[index];
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}
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/** {@inheritDoc} */
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@Override
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public FieldDerivativeStructure<T> getAddendum() {
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final T[] addendum = data.clone();
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addendum[0] = addendum[0].getField().getZero();
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return new FieldDerivativeStructure<>(factory, addendum);
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}
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/** Get the value part of the derivative structure.
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* @return value part of the derivative structure
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* @see #getPartialDerivative(int...)
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return factory.getDerivativeField().getPi();
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}
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/**
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* Test for the equality of two derivative structures.
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* <p>
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* Derivative structures are considered equal if they have the same number
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* of free parameters, the same derivation order, and the same derivatives.
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* </p>
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* @param other Object to test for equality to this
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* @return true if two derivative structures are equal
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*/
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@Override
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public boolean equals(Object other) {
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if (this == other) {
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return true;
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}
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if (other instanceof FieldDerivativeStructure &&
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((FieldDerivativeStructure<?>) other).getField().equals(getField())) {
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final FieldDerivativeStructure<T> rhs = (FieldDerivativeStructure<T>) other;
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return (getFreeParameters() == rhs.getFreeParameters()) &&
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(getOrder() == rhs.getOrder()) &&
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MathArrays.equals(data, rhs.data);
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}
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return false;
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}
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/**
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* Get a hashCode for the derivative structure.
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* @return a hash code value for this object
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*/
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@Override
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public int hashCode() {
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return 227 + 229 * getFreeParameters() + 233 * getOrder() + 239 * Arrays.hashCode(data);
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}
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}

‎hipparchus-core/src/main/java/org/hipparchus/analysis/differentiation/FieldGradient.java‎

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@@ -149,6 +149,12 @@ public FieldGradient<T> withValue(final T v) {
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return new FieldGradient<>(v, grad);
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}
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/** {@inheritDoc} */
153+
@Override
154+
public FieldGradient<T> getAddendum() {
155+
return new FieldGradient<>(value.getField().getZero(), grad);
156+
}
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/** Get the value part of the function.
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* @return value part of the value of the function
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*/

‎hipparchus-core/src/main/java/org/hipparchus/analysis/differentiation/FieldUnivariateDerivative1.java‎

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@@ -101,6 +101,12 @@ public FieldUnivariateDerivative1<T> withValue(final T value) {
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return new FieldUnivariateDerivative1<>(value, f1);
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}
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104+
/** {@inheritDoc} */
105+
@Override
106+
public FieldUnivariateDerivative1<T> getAddendum() {
107+
return new FieldUnivariateDerivative1<>(f0.getField().getZero(), f1);
108+
}
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/** Get the value part of the univariate derivative.
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* @return value part of the univariate derivative
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*/

‎hipparchus-core/src/main/java/org/hipparchus/analysis/differentiation/FieldUnivariateDerivative2.java‎

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@@ -108,6 +108,12 @@ public FieldUnivariateDerivative2<T> withValue(final T value) {
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return new FieldUnivariateDerivative2<>(value, f1, f2);
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}
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111+
/** {@inheritDoc} */
112+
@Override
113+
public FieldUnivariateDerivative2<T> getAddendum() {
114+
return new FieldUnivariateDerivative2<>(f0.getField().getZero(), f1, f2);
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}
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/** Get the value part of the univariate derivative.
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* @return value part of the univariate derivative
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*/

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