Author: erans
Date: Thu Jan 6 16:17:25 2011
New Revision: 1055929
URL: http://svn.apache.org/viewvc?rev=1055929&view=rev
Log:
MATH-468
Forgot to commit that file!
Modified:
commons/proper/math/trunk/src/main/java/org/apache/commons/math/util/MathUtils.java
Modified:
commons/proper/math/trunk/src/main/java/org/apache/commons/math/util/MathUtils.java
URL:
http://svn.apache.org/viewvc/commons/proper/math/trunk/src/main/java/org/apache/commons/math/util/MathUtils.java?rev=1055929&r1=1055928&r2=1055929&view=diff
==============================================================================
---
commons/proper/math/trunk/src/main/java/org/apache/commons/math/util/MathUtils.java
(original)
+++
commons/proper/math/trunk/src/main/java/org/apache/commons/math/util/MathUtils.java
Thu Jan 6 16:17:25 2011
@@ -35,6 +35,7 @@ import org.apache.commons.math.exception
import org.apache.commons.math.exception.MathIllegalArgumentException;
import org.apache.commons.math.exception.MathRuntimeException;
import org.apache.commons.math.exception.NumberIsTooLargeException;
+import org.apache.commons.math.exception.NotFiniteNumberException;
/**
* Some useful additions to the built-in functions in {...@link Math}.
@@ -1841,6 +1842,35 @@ public final class MathUtils {
}
/**
+ * Check that the argument is a real number.
+ *
+ * @param x Argument.
+ * @throws NotFiniteNumberException if {...@code x} is not a
+ * finite real number.
+ */
+ public static void checkFinite(final double x) {
+ if (Double.isInfinite(x) || Double.isNaN(x)) {
+ throw new NotFiniteNumberException(x);
+ }
+ }
+
+ /**
+ * Check that all the elements are real number.
+ *
+ * @param val Arguments.
+ * @throws NotFiniteNumberException if any values of the array is not a
+ * finite real number.
+ */
+ public static void checkFinite(final double[] val) {
+ for (int i = 0; i < val.length; i++) {
+ final double x = val[i];
+ if (Double.isInfinite(x) || Double.isNaN(x)) {
+ throw new
NotFiniteNumberException(LocalizedFormats.ARRAY_ELEMENT, x, i);
+ }
+ }
+ }
+
+ /**
* Returns the Cartesian norm (2-norm), handling both overflow and
underflow.
* Translation of the minpack enorm subroutine.
*
