Preparing release 3.4.1.
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Luc Maisonobe
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Apache Commons Math 3.4 RELEASE NOTES
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Apache Commons Math 3.4.1 RELEASE NOTES
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The Apache Commons Math team is pleased to announce the release of commons-math3-3.4
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The Apache Commons Math team is pleased to announce the release of commons-math3-3.4.1
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The Apache Commons Math project is a library of lightweight, self-contained mathematics
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and statistics components addressing the most common practical problems not immediately
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available in the Java programming language or commons-lang.
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This is a minor release: It combines bug fixes and new features.
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Changes to existing features were made in a backwards-compatible
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way such as to allow drop-in replacement of the v3.3 JAR file.
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Most notable among the new features are:
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new distributions (Gumbel, Laplace, Logistic, Nakagami), and
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improvements on percentiles algorithms (better handling for NaNs
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in the regular algorithm, plus a new storeless implementation).
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Bicubic and tricubic interpolators have been fixed and new
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implementations added. There have been numerous bug fixes and
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several improvements on performances or robustness. See below
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for a full list.
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The minimum version of the Java platform required to compile and use
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Apache Commons Math is Java 5.
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Users are encouraged to upgrade to this version as this release not
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only includes bug fixes but also deprecates numerous classes and
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methods that will be deleted from the next major release (4.0).
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Caveat:
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1. The implementation of the BOBYQA optimization algorithm is in alpha
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state (cf. MATH-621): Many code paths are untested, and we are looking
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for volunteers to improve the code readability, robustness and performance
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and to extend the unit tests suite.
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2. A few methods in the FastMath class are in fact slower that their
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counterpart in either Math or StrictMath (cf. MATH-740 and MATH-901).
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This is a maintenance release: It fixes issue MATH-1188.
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Changes in this version include:
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New features:
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o MATH-1066: Added Bessel functions of the first kind, based on NetLib implementation. Thanks to Brian Wignall.
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o MATH-1180: Method to create a sequence of integers (in "o.a.c.m.util.MathArrays").
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o MATH-1172: New class "SimpleCurveFitter": Boiler-plate code to allow fitting of
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a user-defined parametric function.
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o MATH-1173: New classes "TricubicInterpolatingFunction" and "TricubicInterpolator" to
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replace "TricubicSplineInterpolatingFunction" and "TricubicSplineInterpolator".
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o MATH-1166: New classes "BicubicInterpolatingFunction" and "BicubicInterpolator" to
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replace "BicubicSplineInterpolatingFunction" and "BicubicSplineInterpolator".
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o Boundary attributes in regions now provides the BSP tree nodes that
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were used to split the sub-hyperplane forming the boundary part of the facet.
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o MATH-1144: Interface to allow parameter validation in "o.a.c.m.fitting.leastsquares":
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the point computed by by the optimizer can be modified before evaluation.
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o MATH-1154: Changed classes in the inference package that instantiate distributions to
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pass null RandomGenerators to avoid initialization overhead for the default
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generator.
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o MATH-1156: Added all Java 8 StrictMath methods to FastMath, so FastMath remains compatible
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with newer Java versions.
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o MATH-1139: Added Gumbel, Laplace, Logistic and Nakagami distributions. Thanks to Alexey Volkov.
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o MATH-1120: Added several different estimation types and NaN handling strategies for Percentile. Thanks to Venkatesha Murthy.
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o MATH-418: Added implementation of PSquare algorithm to estimate percentiles without
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storing data in memory (i.e. as StorelessUnivariateStatistic). Thanks to Venkatesha Murthy.
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Fixed Bugs:
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o MATH-1142: Improve performance of kalman gain calculation in "KalmanFilter" by
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directly solving a linear system rather than computing the matrix
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inverse. Thanks to Arne Schwarz.
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o MATH-1181: Fixed integer overflow in KolmogorovSmirnovTest causing 2-sample test
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to use exact method when the product of the sample sizes exceeds
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Integer.MAX_VALUE, resulting in effectively hung execution.
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o MATH-1178: Fixed example in userguide ("stat" section). Thanks to Dmitriy.
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o MATH-1175: Fixed inverse cumulative probability of 0 in "LaplaceDistribution". Thanks to Karsten Loesing.
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o MATH-1174: Fixed a problem with too thin polygons considered to have infinite size.
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o MATH-1162: Fixed a problem with vanishing cut sub-hyperplanes during BSP tree merging.
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o MATH-1167: "o.a.c.m.stat.regression.OLSMultipleLinearRegression": Use threshold
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when performing "QRDecomposition". Thanks to Neil Ireson.
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o MATH-1165: "FuzzyKMeansClusterer" has thrown an exception in case one of the data
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points was equal to a cluster center. Thanks to Pashutan Modaresi.
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o MATH-1160: Provide access to state derivatives in ContinuousOutputModel.
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o MATH-1138: Fixed bicubic spline interpolator, using Akima splines. Thanks to Hank Grabowski.
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o MATH-1147: Added statistics missing from toString method in SummaryStatistics.
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o MATH-1152: Improved performance of "EnumeratedDistribution#sample()" by caching
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the cumulative probabilities and using binary rather than a linear search. Thanks to Andras Sereny.
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o MATH-1148: "MonotoneChain" did not take the tolerance factor into account when
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sorting the input points. In case of collinear points this could result
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in a "ConvergenceException" when computing the hull. Thanks to Guillaume Marceau.
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o MATH-1151: Interface "ValueAndJacobianFunction" is a precondition for lazy
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evaluation (in "o.a.c.m.fitting.leastsquares").
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o MATH-1145: Fix potential integer overflows in "MannWhitneyUTest" when providing
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large sample arrays. Thanks to Anders Conbere.
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o MATH-1149: Fixed potential null pointer dereferencing in constructor of
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"DummyStepInterpolator(DummyStepInterpolator)". Thanks to M Kim.
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o MATH-1136: Fixed BinomialDistribution to deal with degenerate cases correctly. Thanks to Aleksei Dievskii.
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o MATH-1135: "MonotoneChain" failed to generate a convex hull if only a minimal hull
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shall be created (includeCollinearPoints=false) and collinear hull points
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were present in the input. Thanks to Guillaume Marceau.
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o MATH-1131: Improve performance of "KolmogorovSmirnovTest#kolmogorovSmirnovTest(...)" for
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large samples. Also changed implementation for large n to use Pelz-Good
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approximation. Thanks to Schalk W. Cronjé.
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o MATH-1134: "BicubicSplineInterpolatingFunction": all fields made final and initialized in
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the constructor. Added flag to request initialization, or not, of the internal
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data needed for partial derivatives.
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o MATH-984: Constrained EmpiricalDistribution sample/getNextValue methods to return
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values within the range of the data; correctly linked RandomGenerator to
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superclass so that RealDistribution reseedRandomGenerator method works.
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o MATH-1129: "Percentile": wrong sorting in the presence of NaN.
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o MATH-1127: Fixed overflow in Precision.equals with ulps (both double and float versions).
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o MATH-1125: Performance improvements for Student's t-distribution. Thanks to Ajo Fod.
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o MATH-1123: Fixed NullPointerException when chopping-off a sub-hyperplane
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that is exactly at a region boundary. Thanks to Aurélien Labrosse.
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o MATH-1121: "BrentOptimizer": increment base class iteration counter. Thanks to Ajo Fod.
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o MATH-1188: Fixed non-Java1.5 code in BesselJ.
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Changes:
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o Spurious vertices in the middle of otherwise straight edges are now
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filtered out when rebuilding polygons boundaries from BSP trees.
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o MATH-1128: Added lazy evaluation to "LeastSquaresFactory" (in "o.a.c.m.fitting.leastsquares")
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to avoid evaluating the model when the optimization algorithm does not actually
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require it.
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For complete information on Apache Commons Math, including instructions on how to submit bug reports,
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6
pom.xml
6
pom.xml
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<modelVersion>4.0.0</modelVersion>
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<groupId>org.apache.commons</groupId>
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<artifactId>commons-math3</artifactId>
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<version>3.5-SNAPSHOT</version>
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<version>3.4.1</version>
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<name>Apache Commons Math</name>
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<inceptionYear>2003</inceptionYear>
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@ -363,9 +363,9 @@
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<!-- This value must reflect the current name of the base package. -->
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<commons.osgi.symbolicName>org.apache.commons.math3</commons.osgi.symbolicName>
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<!-- do not use snapshot suffix here -->
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<commons.release.version>3.4</commons.release.version>
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<commons.release.version>3.4.1</commons.release.version>
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<commons.release.desc>(requires Java 1.5+)</commons.release.desc>
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<!-- <commons.rc.version>RC1</commons.rc.version> -->
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<commons.rc.version>RC1</commons.rc.version>
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<commons.binary.suffix>-bin</commons.binary.suffix>
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<commons.release.2.version>2.2</commons.release.2.version>
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@ -27,6 +27,8 @@
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<item name="Overview" href="/index.html"/>
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<item name="Downloads" href="http://commons.apache.org/math/download_math.cgi"/>
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<item name="Latest API docs (development)" href="apidocs/index.html"/>
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<item name="Javadoc (3.4.1 release)"
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href="http://commons.apache.org/math/javadocs/api-3.4.1/index.html"/>
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<item name="Javadoc (3.4 release)"
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href="http://commons.apache.org/math/javadocs/api-3.4/index.html"/>
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<item name="Javadoc (3.3 release)"
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@ -95,32 +95,32 @@ limitations under the License.
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</p>
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</subsection>
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</section>
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<section name="Apache Commons Math 3.4 (requires Java 1.5+)">
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<section name="Apache Commons Math 3.4.1 (requires Java 1.5+)">
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<subsection name="Binaries">
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<table>
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<tr>
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<td><a href="[preferred]/commons/math/binaries/commons-math3-3.4-bin.tar.gz">commons-math3-3.4-bin.tar.gz</a></td>
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<td><a href="http://www.apache.org/dist/commons/math/binaries/commons-math3-3.4-bin.tar.gz.md5">md5</a></td>
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<td><a href="http://www.apache.org/dist/commons/math/binaries/commons-math3-3.4-bin.tar.gz.asc">pgp</a></td>
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<td><a href="[preferred]/commons/math/binaries/commons-math3-3.4.1-bin.tar.gz">commons-math3-3.4.1-bin.tar.gz</a></td>
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<td><a href="http://www.apache.org/dist/commons/math/binaries/commons-math3-3.4.1-bin.tar.gz.md5">md5</a></td>
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<td><a href="http://www.apache.org/dist/commons/math/binaries/commons-math3-3.4.1-bin.tar.gz.asc">pgp</a></td>
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</tr>
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<tr>
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<td><a href="[preferred]/commons/math/binaries/commons-math3-3.4-bin.zip">commons-math3-3.4-bin.zip</a></td>
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<td><a href="http://www.apache.org/dist/commons/math/binaries/commons-math3-3.4-bin.zip.md5">md5</a></td>
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<td><a href="http://www.apache.org/dist/commons/math/binaries/commons-math3-3.4-bin.zip.asc">pgp</a></td>
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<td><a href="[preferred]/commons/math/binaries/commons-math3-3.4.1-bin.zip">commons-math3-3.4.1-bin.zip</a></td>
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<td><a href="http://www.apache.org/dist/commons/math/binaries/commons-math3-3.4.1-bin.zip.md5">md5</a></td>
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<td><a href="http://www.apache.org/dist/commons/math/binaries/commons-math3-3.4.1-bin.zip.asc">pgp</a></td>
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</tr>
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</table>
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</subsection>
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<subsection name="Source">
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<table>
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<tr>
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<td><a href="[preferred]/commons/math/source/commons-math3-3.4-src.tar.gz">commons-math3-3.4-src.tar.gz</a></td>
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<td><a href="http://www.apache.org/dist/commons/math/source/commons-math3-3.4-src.tar.gz.md5">md5</a></td>
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<td><a href="http://www.apache.org/dist/commons/math/source/commons-math3-3.4-src.tar.gz.asc">pgp</a></td>
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<td><a href="[preferred]/commons/math/source/commons-math3-3.4.1-src.tar.gz">commons-math3-3.4.1-src.tar.gz</a></td>
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<td><a href="http://www.apache.org/dist/commons/math/source/commons-math3-3.4.1-src.tar.gz.md5">md5</a></td>
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<td><a href="http://www.apache.org/dist/commons/math/source/commons-math3-3.4.1-src.tar.gz.asc">pgp</a></td>
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</tr>
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<tr>
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<td><a href="[preferred]/commons/math/source/commons-math3-3.4-src.zip">commons-math3-3.4-src.zip</a></td>
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<td><a href="http://www.apache.org/dist/commons/math/source/commons-math3-3.4-src.zip.md5">md5</a></td>
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<td><a href="http://www.apache.org/dist/commons/math/source/commons-math3-3.4-src.zip.asc">pgp</a></td>
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<td><a href="[preferred]/commons/math/source/commons-math3-3.4.1-src.zip">commons-math3-3.4.1-src.zip</a></td>
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<td><a href="http://www.apache.org/dist/commons/math/source/commons-math3-3.4.1-src.zip.md5">md5</a></td>
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<td><a href="http://www.apache.org/dist/commons/math/source/commons-math3-3.4.1-src.zip.asc">pgp</a></td>
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</tr>
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</table>
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</subsection>
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