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| <!-- |
| This file is used by the maven-changes-plugin to generate the release notes. |
| Useful ways of finding items to add to this file are: |
| |
| 1. Add items when you fix a bug or add a feature (this makes the |
| release process easy :-). |
| |
| 2. Do a bugzilla search for tickets closed since the previous release. |
| |
| 3. Use the report generated by the maven-changelog-plugin to see all |
| CVS commits. Set the project.properties' maven.changelog.range |
| property to the number of days since the last release. |
| |
| |
| The <action> type attribute can be add,update,fix,remove. |
| --> |
| |
| <document> |
| <properties> |
| <title>Commons Math Release Notes</title> |
| </properties> |
| <body> |
| <release version="2.0" date="TBD" description="TBD"> |
| <action dev="psteitz" type="add" issue="MATH-212" due-to="Jason C. HandUber"> |
| Added support for copying statistics. Changes to stats classes |
| include copy constructor, static copy(-,-) and instance copy() |
| methods. Added copy() to UnivariateStatistic and StorelessUnivariateStatistic |
| interfaces. |
| </action> |
| <action dev="luc" type="add" issue="MATH-229" due-to="Cyril Briquet"> |
| Added a removal feature for observations in descriptive statistics. |
| </action> |
| <action dev="luc" type="add" > |
| Added a scalb method in MathUtils. This method is similar to the method |
| with same name added in java.lang.Math as of Java 6. |
| </action> |
| <action dev="brentworden" type="fix" issue="MATH-227" due-to="Joerg Henning"> |
| Fixed F distribution inverse CDF computation for small denominator degrees of freedom. |
| </action> |
| <action dev="luc" type="fix" issue="MATH-226" due-to="Stuart Siegel"> |
| Fixed an error in CorrelatedRandomVectorGenerator leading to a component of |
| the generated vector being constant. |
| </action> |
| <action dev="luc" type="fix" issue="MATH-223" due-to="John Mulcahy"> |
| Greatly improved QR-decomposition speed using transposed matrices internally. |
| </action> |
| <action dev="luc" type="fix" due-to="Pascal Parraud"> |
| Fixed an infinite loop encountered in some backward integration cases for ODE solvers. |
| </action> |
| <action dev="luc" type="add" issue="MATH-222" due-to="Ted Dunning"> |
| Added beta distribution. |
| </action> |
| <action dev="luc" type="add" issue="MATH-222" due-to="Ted Dunning"> |
| Added probability density functions computation for distributions for which |
| it is feasible. |
| </action> |
| <action dev="luc" type="fix" issue="MATH-221" due-to="Dieter Roth"> |
| Changed the Complex.equals() method so that it considers +0 and -0 are equal, |
| as required by IEEE-754 standard. |
| </action> |
| <action dev="luc" type="add" issue="MATH-220"> |
| Added JAMA-like interfaces for eigen/singular problems. The implementation |
| of eigen-decomposition is based on the very quick dqd/dqds algorithms and some |
| parts of the MRRR algorithm. This leads to very fast and accurate solutions. |
| </action> |
| <action dev="luc" type="add" issue="MATH-220" > |
| Added JAMA-like interfaces for decomposition algorithms. These interfaces |
| decompose a matrix as a product of several other matrices with predefined |
| properties and shapes depending on the algorithm. These algorithms allow to |
| solve the equation A * X = B, either for an exact linear solution |
| (LU-decomposition) or an exact or least-squares solution (QR-decomposition). |
| </action> |
| <action dev="luc" type="add" issue="MATH-219" due-to="Andrew Berry"> |
| Added removeData methods for the SimpleRegression class. This allows |
| to support regression calculations across a sliding window of (time-based) |
| observations without having to recalculate for the entire window every time. |
| </action> |
| <action dev="luc" type="add" due-to="Andreas Rieger"> |
| Support for one dimensional vectors has been added to the linear algebra |
| package with a RealVector interface, a RealVectorImpl default implementation |
| using a single double array to store elements and a RealVectorFormat for |
| input/output. |
| </action> |
| <action dev="psteitz" type="update" issue="MATH-217"> |
| Changed OLS regression implementation added in MATH-203 to use |
| QR decomposition to solve the normal equations. |
| </action> |
| <action dev="luc" type="add"> |
| New ODE integrators have been added: the explicit Adams-Bashforth and implicit |
| Adams-Moulton multistep methods. These methods support customizable starter |
| integrators and support discrete events even during the start phase. |
| All these methods provide the same rich features has the existing ones: |
| continuous output, step handlers, discrete events, G-stop ... |
| </action> |
| <action dev="luc" type="fix" issue="MATH-214" > |
| Replaced size adjustment of all steps of fixed steps Runge-Kutta integrators by |
| a truncation of the last step only. |
| </action> |
| <action dev="luc" type="update"> |
| The ODE integrators now support several step handlers at once, instead of just one. |
| This is more consistent with event handlers management. |
| The setStepHandler method has therefore been replaced by addStephandler, the |
| getStepHandler method has been replaced by getStepHandlers which returns a Collection |
| and a clearStepHandlers method has been added. |
| </action> |
| <action dev="luc" type="add"> |
| All step interpolators for ODE integrators now provide interpolation for |
| both the state and its time derivatives. The interpolated derivatives are |
| the exact derivatives of the interpolated state, thus preserving consistency. |
| The general step handlers hence do not need to call the derivation function |
| anymore. The fixed step handlers also get the time derivative of the state |
| as an additional argument along with the state when they are called. |
| </action> |
| <action dev="luc" type="fix" issue="MATH-213" > |
| Changed return type for FirstOrderIntegrator.integrate() to double |
| in order to retrieve exact stop time. This allows to handle properly |
| integration interruption due to an EventHandler instance asking to |
| stop the integration when its associated event is triggered. The state |
| was already set to the current state at interruption time, but it was |
| difficult to get the corresponding time (it involved setting a step |
| handler monitoring the last step specially). |
| </action> |
| <action dev="luc" type="update"> |
| Clarified the ODE package by breaking in into several sub-packages and renaming |
| classes (SwitchingFunctions/EventHandler, SwitchingFunctionsHandler/CombinedEventsManager) |
| </action> |
| <action dev="luc" type="fix" issue="MATH-210" > |
| Changed return type for FirstOrderIntegrator.getSwitchingFunctions() |
| to a collection of SwitchingFunction instances. This better suits the |
| intended use of the method and fixes a visibility error since the |
| previous return type referenced the package private SwitchState class. |
| </action> |
| <action dev="luc" type="fix" issue="MATH-209" due-to="Thomas Chust"> |
| Fixed dimension error on output vector for the operate method |
| in RealMatrixImpl and BigMatrixImpl classes. |
| </action> |
| <action dev="luc" type="update"> |
| The FirstOrderDifferentialEquations, FirstOrderIntegrator and FixedStepHandler |
| interfaces now extends Serializable, allowing integrators, problems and |
| handlers to be embedded into users Serializable classes. |
| </action> |
| <action dev="luc" type="add"> |
| Added several convenience methods and constants for Vector3D and Rotation. |
| </action> |
| <action dev="luc" type="update"> |
| Replaced public no argument constructors with IDENTITY or ZERO |
| static instances for immutable classes Vector3D and Rotation. |
| </action> |
| <action dev="luc" type="fix"> |
| Fixed inconsistencies in the naming scheme for static fields in |
| Vector3D and Rotation with respect to the overall library. |
| </action> |
| <action dev="luc" type="update" > |
| Greatly improved RealMatrixImpl and BigMatrixImpl performances, |
| both in terms of speed and in terms of temporary memory footprint. |
| </action> |
| <action dev="luc" type="add" issue="MATH-203" due-to="Mauro Talevi"> |
| Added Mauro's patch to support multiple regression. |
| </action> |
| <action dev="luc" type="update" > |
| Starting with version 2.0 of the library, the minimal version of the Java |
| platform required to compile and use commons-math is Java 5. This version |
| is widely deployed now on many systems. It brings new important features |
| for specific mathematical developments, for example new functions (log10, |
| cbrt, ulp, signum, cosh, sinh, tanh, hypot, expm1, log1p), autoboxing, |
| MathContext or RoundingMode. It also brings important features for general |
| development, for example enums, generics or annotations. |
| </action> |
| <action dev="luc" type="add" > |
| Switching functions can now throw dedicated SwitchException from all their |
| method. At upper call level, the various ODE integrators handle these new |
| exceptions and wrap them into IntegratorException instances, hence the |
| integrators methods signature did not change. |
| </action> |
| <action dev="luc" type="add" issue="MATH-202"> |
| Added the getSwitchingFunctions and clearSwitchingFunctions to the |
| FirstOrderIntegrator interface and all its implementations |
| </action> |
| <action dev="luc" type="update" > |
| Removed deprecated features. This includes the following changes. Factory-based |
| instantiation replaced by setter injection in 1.2 in several classes have been |
| removed. Protected fields in matrices implementations have been declared final |
| and private. Identity factory methods moved to MatrixUtils class have been |
| removed. Complex utilities methods that have been superseded by Complex instance |
| methods have been removed. |
| </action> |
| </release> |
| <release version="1.3-SNAPSHOT" date="TBD" description="TBD"> |
| <action dev="luc" type="fix" issue="MATH-205" due-to="Roman Werpachowski"> |
| Fixed formula in fast cosine transformer javadoc comments. |
| </action> |
| <action dev="brentworden" type="fix" issue="MATH-193" due-to="Michael Heuer and Sebb"> |
| Javadoc and style fixes. |
| </action> |
| <action dev="luc" type="fix" issue="MATH-198" due-to="Frederick Salardi"> |
| Added an error detection for missing imaginary character while parsing complex string |
| </action> |
| <action dev="luc" type="fix" issue="MATH-199" due-to="Mick"> |
| Detect numerical problems in Q.R decomposition for Levenberg-Marquardt estimator |
| and report them appropriately |
| </action> |
| <action dev="luc" type="fix" issue="MATH-200" due-to="Plamen Petrov"> |
| Fixed several crashes in getCovariances() and guessParametersErrors() in |
| AbstractEstimator when some parameters are bound. The methods now explicitly |
| give result only about unbound parameters. |
| </action> |
| <action dev="brentworden" type="fix" issue="MATH-201" due-to="Peter Wyngaard"> |
| Fixed truncation error in t-test classes for large t values. |
| </action> |
| <action dev="brentworden" type="fix" issue="MATH-204" due-to="Mick"> |
| Added root checks for the endpoints. |
| </action> |
| </release> |
| <release version="1.2" date="2008-02-24" |
| description="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."> |
| <action dev="luc" type="fix"> |
| Fixed numerous warnings in test code. |
| </action> |
| <action dev="luc" type="fix" issue="MATH-156" due-to="Tyler Ward"> |
| Use the initial guess provided by the user in BrentSolver.solve(), thus |
| improving speed. |
| </action> |
| <action dev="luc" type="add"> |
| Added the estimation, optimization, geometry and ode packages from the |
| Mantissa library. |
| </action> |
| <action dev="brentworden" type="fix" issue="MATH-18" due-to="Phil Steitz"> |
| Made ComplexFormat format double values with a provided NumberFormat |
| instance instead of using the real part format for all values. |
| </action> |
| <action dev="psteitz" type="add" issue="MATH-120" due-to="Todd C. Parnell"> |
| Added Pascal distribution implementation. |
| </action> |
| <action dev="psteitz" type="add" issue="MATH-148" due-to="Joni Salonen"> |
| Added QR Decomposition. |
| </action> |
| <action dev="psteitz" type="fix" issue="MATH-60" due-to="Nhung Nnguyen"> |
| Modified ProperFractionFormat to reject embedded minus signs. |
| </action> |
| <action dev="psteitz" type="fix" issue="MATH-151" due-to="Luc Maisonobe"> |
| 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. |
| </action> |
| <action dev="psteitz" type="add" issue="MATH-140" due-to="Xiaogang Zhang"> |
| Added Fast Fourier Transform implementation. |
| </action> |
| <action dev="psteitz" type="fix" issue="MATH-85" due-to="Mark Osborn, Luc Maisonobe"> |
| Modified getSumSquaredErrors method in SimpleRegression to always |
| return a non-negative result. |
| </action> |
| <action dev="brentworden" type="fix" issue="MATH-153" due-to="Remi Arntzen"> |
| Corrected nextInt and nextLong to handle wide value ranges. |
| </action> |
| <action dev="psteitz" type="fix" issue="MATH-166" due-to="Lukas Theussl"> |
| Increased default precision of Gamma and Beta functions. |
| </action> |
| <action dev="psteitz" type="update" issue="MATH-158" due-to="Hasan Diwan"> |
| Added log function to MathUtils. |
| </action> |
| <action dev="psteitz" type="update" issue="MATH-160" due-to="Matthias Hummel"> |
| Added two sample (binned comparison) ChiSquare test. |
| </action> |
| <action dev="psteitz" type="fix" issue="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. |
| </action> |
| <action dev="brentworden" type="update" issue="MATH-170" due-to="David J. M. Karlsen"> |
| Added SynchronizedDescriptiveStatistics class. |
| </action> |
| <action dev="brentworden" type="update" issue="MATH-154" due-to="Remi Arntzen"> |
| Added addAndCheck, mulAndCheck, and subAndCheck MathUtils methods for |
| long integer arguments. |
| </action> |
| <action dev="psteitz" type="update" issue="MATH-171" due-to="Niall Pemberton"> |
| Merged most functions from ComplexUtils into Complex class, added |
| static factory method to Complex. |
| </action> |
| <action dev="psteitz" type="update"> |
| 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. |
| </action> |
| <action dev="psteitz" type="fix" issue="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. |
| </action> |
| <action dev="psteitz" type="fix" issue="MATH-175" due-to="Carl Anderson"> |
| Added check and rescaling of expected counts to sum to sum of expected |
| counts if necessary in ChiSquare test. |
| </action> |
| <action dev="luc" type="fix" issue="MATH-164"> |
| Handle multiplication of Complex numbers with infinite parts specially. |
| </action> |
| <action dev="luc" type="update" issue="MATH-176" due-to="Kazuhiro Koshino"> |
| Add errors guessing to least-squares estimators. |
| </action> |
| <action dev="luc" type="update" issue="MATH-179" due-to="Niall Pemberton"> |
| Add tests for Fraction constructor using double parameter. |
| </action> |
| <action dev="psteitz" type="add" issue="MATH-173" due-to="Bob MacCallum"> |
| Added one-way ANOVA implementation. |
| </action> |
| <action dev="luc" type="update" issue="MATH-181" due-to="Niall Pemberton"> |
| Add Fraction constructor using max denominator value. |
| </action> |
| <action dev="luc" type="fix" issue="MATH-182"> |
| Add integer overflow checks in Fraction constructor using double parameter. |
| </action> |
| <action dev="luc" type="fix" issue="MATH-185"> |
| Throw EOFException when using empty files with ValueServer in replay and |
| digest modes. |
| </action> |
| <action dev="luc" type="update" > |
| Added a equals and hash methods in MathUtils to check for double arrays |
| </action> |
| <action dev="luc" type="add" > |
| Added an angle normalization method in MathUtils to force angles in some |
| user-defined interval |
| </action> |
| <action dev="luc" type="add" > |
| Added vectorial covariance computation (either sample or population |
| covariance) |
| </action> |
| <action dev="luc" type="add" > |
| Added multivariate summary statistics. |
| </action> |
| <action dev="psteitz" type="update" issue="MATH-191"> |
| Added getSumOfLogs method to SummaryStatistics and made SumOfLogs |
| instance used by GeometricMean configurable. |
| </action> |
| <action dev="psteitz" type="fix" issue="MATH-184" due-to="Yegor Bryukhov"> |
| Fixed AbstractIntegerDistribution cumulativeProbablility(-,-) |
| to correctly handle double arguments. |
| </action> |
| <action dev="psteitz" type="update" issue="MATH-188" due-to="Sebastian Bazley"> |
| 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. |
| </action> |
| </release> |
| <release version="1.1" date="2005-12-17" |
| description="This is a maintenance release containing bug fixes and enhancements. |
| All API changes are binary compatible with version 1.0. The enhancements |
| include some new probability distributions, a Fraction class, new matrix |
| and numerical utilities, and a PRNG pluggability framework making it |
| possible to replace the JDK-supplied random number generator in |
| commons-math (and elsewhere) with alternative PRNG implementations."> |
| <action dev="psteitz" type="fix" issue="MATH-74"> |
| Made NewtonSolver derivative field transient and implemented readObject to |
| initialize. |
| </action> |
| <action dev="psteitz" type="fix" issue="MATH-74"> |
| Made sampleStats field private and changed getUpperBounds to return a fresh |
| copy in EmpiricalDistributionImpl. |
| </action> |
| <action dev="psteitz" type="update"> |
| Added polar2Complex method to ComplexUtils to create Complex numbers |
| from polar representations. |
| </action> |
| <action dev="psteitz" type="fix" issue="MATH-49" due-to="Elliotte Harold"> |
| Made all serialVersionUIDs private. |
| </action> |
| <action dev="psteitz" type="fix" issue="MATH-5"> |
| Improved documentation and test cases related to handling of infinite |
| and NaN values in Complex, ComplexUtils classes. |
| </action> |
| <action dev="psteitz" type="fix" issue="MATH-57" due-to="Mauro Talevi"> |
| Fixed incorrect NaN handling in o.a.m.s.d.rank.Min, Max |
| </action> |
| <action dev="psteitz" type="fix" issue="MATH-74"> |
| Changed RealMatrixImpl.equals to use Double.doubleToLongBits to compare |
| corresponding matrix entries. |
| </action> |
| <action dev="psteitz" type="fix" issue="MATH-74"> |
| Eliminated floating point equals comparison in Percentile.evaluate. |
| </action> |
| <action dev="psteitz" type="fix" issue="MATH-74"> |
| Eliminated unnecessary assignment statements in Skewness.getResult |
| method. |
| </action> |
| <action dev="psteitz" type="fix" issue="MATH-74"> |
| Synchronized getters in ResizeableDoubleArray. |
| </action> |
| <action dev="psteitz" type="fix" issue="MATH-74"> |
| Eliminated unnecessary assignment statement in BisectionSolver.solve |
| method. |
| </action> |
| <action dev="psteitz" type="fix" issue="MATH-74"> |
| Implemented hashCode in the Complex class and changed the semantics of |
| equals to make all instances with real or imaginary part NaN equal. |
| </action> |
| <action dev="psteitz" type="fix" issue="MATH-12" due-to="Keith McDonald"> |
| Fixed bin index overflow problem in EmpiricalDistributionImpl. |
| </action> |
| <action dev="brentworden" type="fix" issue="MATH-108" due-to="Xiaogang Zhang"> |
| Added protection against numerical overflow and underflow in the |
| isBracketing method. |
| </action> |
| <action dev="brentworden" type="fix" issue="MATH-47" due-to="Nikhil Gupte"> |
| Fixed division by zero error in rounding methods. |
| </action> |
| <action dev="brentworden" type="fix" issue="MATH-100" due-to="Mike Hu"> |
| Added upper tail cumulative probability method to HypergeometricDistributionImpl. |
| </action> |
| <action dev="brentworden" type="fix" issue="MATH-22" due-to="Xiaogang Zhang"> |
| Added better handling of numerical overflow and division by zero in |
| Complex calculations. |
| </action> |
| <action dev="brentworden" type="fix" issue="MATH-92" due-to="Mikael Weigelt"> |
| Changed ContinuedFraction to better handle infinite convergents that |
| resulted in divergent continued fraction evaluations. |
| </action> |
| <action dev="brentworden" type="fix" issue="MATH-32" due-to="Srinivas Vemury"> |
| Changed rounding methods to not rely on BigDecimal conversions which |
| was causing numerical error. |
| </action> |
| <action dev="psteitz" type="fix" issue="MATH-3" due-to="Jörg Weimar"> |
| Changed Fraction(double) to correctly handle near-integral arguments. |
| </action> |
| <action dev="psteitz" type="fix" issue="MATH-143" due-to="Jörg Weimar"> |
| Changed lcm to throw ArithmeticException (instead of returning bogus |
| value) if the result is too large to store as an integer. |
| </action> |
| <action dev="psteitz" type="fix" issue="MATH-70" due-to="Mary Ellen Foster"> |
| Added factories for TTest, ChiSquareTest and TestUtils class with |
| static methods to create instances and execute tests. |
| </action> |
| <action dev="psteitz" type="update" issue="MATH-95" due-to="Paul Field"> |
| Eliminated repeated endpoint function evalutations in BrentSolver, SecantSolver. |
| </action> |
| <action dev="psteitz" type="update" issue="MATH-137" due-to="Rodrigo di Lorenzo Lopes"> |
| Added setSubMatrix methods to RealMatrixImpl, BigMatrixImpl. To |
| Preserve backward compatibility with version 1.0, these methods were |
| not added to the RealMatrix, BigMatrix interfaces. |
| </action> |
| <action dev="psteitz" type="update"> |
| Added createXIdentityMatrix methods to MatrixUtils and deprecated |
| getIdentity methods in RealMatrixImpl, BigMatrixImpl. |
| Modified RealMatrixImpl, BigMatrixImpl constructors to throw |
| IllegalArgumentExceptions instead of ArrayIndexOutOfBounds when |
| dimension arguments are not positive. |
| </action> |
| <action dev="psteitz" type="update"> |
| Made PRNG pluggable for classes in the random package. Added |
| RandomGenerator interface extracted from java.util.random and abstract |
| implementation, AbstractRandomGenerator providing default |
| implementations of methods based on nextDouble(). Added a constructor |
| taking a RandomGenerator as an argument to RandomDataImpl. Changed |
| ValueServer to use a RandomData in its constructor. Changes to |
| 1.0 classes should be backward compatible (including serialization). |
| </action> |
| <action dev="psteitz" type="update" due-to="C. Scott Ananian"> |
| Added utility methods for overflow-checked integer arithmetic and |
| improved gcd method in MathUtils. |
| </action> |
| <action dev="psteitz" type="fix" issue="MATH-79" due-to="Gilles Gaillard"> |
| Fixed error in TTestImpl.homoscedasticTtest. Implementation was |
| incorrectly using heteroscedastic t statistic. Also improved |
| sensitivity of test cases. |
| </action> |
| <action dev="psteitz" type="fix" issue="MATH-44" due-to="Gilles Gaillard"> |
| Fixed javadoc errors. One-sided t-test significance adjustment was |
| reversed in javadoc for boolean-valued test methods. |
| </action> |
| <action dev="brentworden" type="fix" due-to="Ben Litchfield"> |
| Fixed bug in PolynomialSplineFunction to allow evaluation of the |
| function at the last knot point. |
| </action> |
| <action dev="brentworden" type="add"> |
| Added Weibull distribution implementation. |
| </action> |
| <action dev="brentworden" type="add"> |
| Added Cauchy distribution implementation. |
| </action> |
| <action dev="brentworden" type="add"> |
| Added convenience methods for rounding. |
| </action> |
| <action dev="brentworden" type="add" due-to="C. Scott Ananian"> |
| Added Fraction class based on commons-lang implementation. With the |
| fraction class, FractionFormat and ProperFractionFormat classes were |
| added to provide fraction formatting and parsing. |
| </action> |
| </release> |
| <release version="1.0" date="2004-12-06" |
| description="Apache Commons Math 1.0 - Initial Release"> |
| </release> |
| </body> |
| </document> |
