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| Apache Commons Math Version 1.2-RC2 |
| RELEASE NOTES |
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| This release combines bug fixes and new features. Most notable among the new |
| features are the estimation, optimization, geometry and ode packages added |
| from the Mantissa library. Implementations of fast Fourier transform, QR |
| decomposition and several numerical integration algorithms have also been |
| added, along with enhancements and extensions to packages included in Commons |
| Math 1.1. This release is source and binary compatible with earlier versions |
| of Commons Math. |
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| For more information on Apache Commons Math, see |
| http://commons.apache.org/math/ |
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| SUMMARY OF CHANGES |
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| ADDITIONS |
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| * Added the estimation, optimization, geometry and ode packages from the |
| Mantissa library. |
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| * MATH-120. Added Pascal distribution implementation. Thanks to Todd C. |
| Parnell. |
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| * MATH-148. Added QR Decomposition. Thanks to Joni Salonen. |
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| * MATH-140. Added Fast Fourier Transform implementation. Thanks to Xiaogang |
| Zhang. |
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| * MATH-173. Added one-way ANOVA implementation. Thanks to Bob MacCallum. |
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| * Added an angle normalization method in MathUtils to force angles in some |
| user-defined interval |
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| * Added vectorial covariance computation (either sample or population |
| covariance) |
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| * Added multivariate summary statistics. |
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| BUG FIXES |
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| * Fixed numerous warnings in test code. |
| |
| * MATH-156. Use the initial guess provided by the user in |
| BrentSolver.solve(), thus improving speed. Thanks to Tyler Ward. |
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| * MATH-18. Made ComplexFormat format double values with a provided |
| NumberFormat instance instead of using the real part format for all values. |
| Thanks to Phil Steitz. |
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| * MATH-60. Modified ProperFractionFormat to reject embedded minus signs. |
| Thanks to Nhung Nnguyen. |
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| * MATH-151. Added a nextAfter method in MathUtils to return the next |
| machine-representable number in a specified direction from a given floating |
| point number. Used this to ensure that MathUtils.round does not return |
| incorrect results for numbers with bad IEEE754 representations. Thanks to |
| Luc Maisonobe. |
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| * MATH-85. Modified getSumSquaredErrors method in SimpleRegression to always |
| return a non-negative result. Thanks to Mark Osborn, Luc Maisonobe. |
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| * MATH-153. Corrected nextInt and nextLong to handle wide value ranges. |
| Thanks to Remi Arntzen. |
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| * MATH-166. Increased default precision of Gamma and Beta functions. Thanks |
| to Lukas Theussl. |
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| * MATH-167. Modified NormalDistributionImpl.cumulativeProbablity to catch |
| MaxIterationsExceededException and return 0 or 1, resp. if the argument is |
| more than 20 standard deviations from the mean. |
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| * MATH-174. Changed Mean.evaluate() to use a two-pass algorithm, improving |
| accuracy by exploiting the the fact that this method has access to the full |
| array of data values. |
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| * MATH-175. Added check and rescaling of expected counts to sum to sum of |
| expected counts if necessary in ChiSquare test. Thanks to Carl Anderson. |
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| * MATH-164. Handle multiplication of Complex numbers with infinite parts |
| specially. |
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| * MATH-182. Add integer overflow checks in Fraction constructor using double |
| parameter. |
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| * MATH-185. Throw EOFException when using empty files with ValueServer in |
| replay and digest modes. |
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| * MATH-184. Fixed AbstractIntegerDistribution cumulativeProbablility(-,-) to |
| correctly handle double arguments. Thanks to Yegor Bryukhov. |
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| UPDATES |
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| * MATH-158. Added log function to MathUtils. Thanks to Hasan Diwan. |
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| * MATH-160. Added two sample (binned comparison) ChiSquare test. Thanks to |
| Matthias Hummel. |
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| * MATH-170. Added SynchronizedDescriptiveStatistics class. Thanks to David J. |
| M. Karlsen. |
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| * MATH-154. Added addAndCheck, mulAndCheck, and subAndCheck MathUtils methods |
| for long integer arguments. Thanks to Remi Arntzen. |
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| * MATH-171. Merged most functions from ComplexUtils into Complex class, added |
| static factory method to Complex. Thanks to Niall Pemberton. |
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| * Deprecated abstract factory methods and made DescriptiveStatistics and and |
| SummaryStatistics concrete classes. Pushed implementations up from |
| DescriptiveStatisticsImpl, SummaryStatisticsImpl. Made implementations of |
| statistics configurable via setters. |
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| * MATH-176. Add errors guessing to least-squares estimators. Thanks to |
| Kazuhiro Koshino. |
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| * MATH-179. Add tests for Fraction constructor using double parameter. Thanks |
| to Niall Pemberton. |
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| * MATH-181. Add Fraction constructor using max denominator value. Thanks to |
| Niall Pemberton. |
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| * Added a equals and hash methods in MathUtils to check for double arrays |
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| * MATH-191. Added getSumOfLogs method to SummaryStatistics and made SumOfLogs |
| instance used by GeometricMean configurable. |
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| * MATH-188. Made numerator and denominator final in Fraction and deprecated |
| protected real and imaginary parts fields in Complex, making Fraction |
| immutable and preparing Complex to become fully immutable in 2.0. Thanks to |
| Sebastian Bazley. |
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| DEPRECATIONS SUMMARY |
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| * The abstract factory pattern used to enable pluggable implementations in the |
| statistics, analysis and distributions packages has been deprecated and |
| replaced by setter injection. |
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| * Non-localized exception messages and associated constructors have been |
| deprecated and replaced by localized versions. |
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| * Most methods from the ComplexUtils class have been deprecated, with |
| implementations moved to the Complex class. |
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| See "clirr-report.html" included in the docs directory of the binary |
| distribution for a detailed list of API changes. The "errors" reported at the |
| top of the report are due to protected fields being moved to superclasses. |
| These fields are still available, so there is no backward compatibility issue. |
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| BUILDING COMMONS MATH |
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| Commons math can be built from the source distribution using Maven 1, Maven 2, |
| or Ant, launching any one of these from the top-level directory of the unpacked |
| zip or tarball. For detailed build instructions and information about how to |
| contribute to Commons Math, see "developers.html" in the docs directory of the |
| binary distribution. |
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