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Added min/max utility methods for RealField elements.

This commit is contained in:
Luc Maisonobe 2016-01-06 12:24:21 +01:00
parent dbb04c1ccb
commit c4e2ddf266
1 changed files with 23 additions and 0 deletions
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23
src/main/java/org/apache/commons/math4/util/MathUtils.java
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@ -19,6 +19,7 @@ package org.apache.commons.math4.util;
import java.util.Arrays;
import org.apache.commons.math4.RealFieldElement;
import org.apache.commons.math4.exception.MathArithmeticException;
import org.apache.commons.math4.exception.NotFiniteNumberException;
import org.apache.commons.math4.exception.NullArgumentException;
@ -109,6 +110,28 @@ public final class MathUtils {
return a - TWO_PI * FastMath.floor((a + FastMath.PI - center) / TWO_PI);
}
/** Find the maximum of two field elements.
* @param <T> the type of the field elements
* @param e1 first element
* @param e2 second element
* @return max(a1, e2)
* @since 3.6
*/
public static <T extends RealFieldElement<T>> T max(final T e1, final T e2) {
return e1.subtract(e2).getReal() >= 0 ? e1 : e2;
}
/** Find the minimum of two field elements.
* @param <T> the type of the field elements
* @param e1 first element
* @param e2 second element
* @return min(a1, e2)
* @since 3.6
*/
public static <T extends RealFieldElement<T>> T min(final T e1, final T e2) {
return e1.subtract(e2).getReal() >= 0 ? e2 : e1;
}
/**
* <p>Reduce {@code |a - offset|} to the primary interval
* {@code [0, |period|)}.</p>