Commons Math Release Notes
Fixed error in ChiSquareTestImpl. Tables containing zeros were (incorrectly)
causing IllegalArgumentExceptions to be thrown.
Removed JDK 1.4-dependent code from CertifiedDataAbstractTest,
InvalidMatrixException and MatrixIndexException. Also dropped
BeanTransformer, BeanTransformerTest from the release.
Fixed cumulative frequency and cumulative percentage problem reported
to the commons-dev list by Jon Langlois on 9/14. Integer arguments to
getCumXxx were always returning 0 due to type conversion problems.
Fixed locale-dependency in ComplexFormat.
Renamed univariate package to descriptive and multivariate to regression.
Improved efficiency of logGamma method in o.a.c.m.special.Gamma
Added subMatrix and matrix-valued row and column accessor methods to
RealMatrix, BigMatrix interfaces and RealMatrixImpl, BigMatrixImpl.
Implemented equals and hashCode in RealMatrixImpl and BigMatrixImpl.
Fixed RealMatrixImpl, BigMatrixImpl toString methods to handle empty matrix.
Added support for "population" variance and standard deviation in
Variance (resp. StandardDeviation) classes.
Removed data mutators from RealMatrix, BigMatrix interfaces and
RealMatrixImpl, BigMatrixImpl. RealMatrix and BigMatrix instances
are now immutable.
Added MatrixUtils class, including static factory methods to create
RealMatrix and BigMatrix instances from arrays of various types.
Changed factorial methods to return 1 for argument = 0, instead of
(incorrectly) throwing IllegalArgumentException.
Fixed error in SimpleRegression.getSignificance. Value returned was
off by a factor of 2 (did not match javadoc).
Refactored distribution package so that mixed distributions and
discrete distributions with non-integer values can be represented.
Added Distribution base interface as well as IntegerDistribution
extending DiscreteDistribution. Previously existing discrete
distributions now implement IntegerDistribution.
Added Poisson distribution implementation.
Eliminated unecessary array copy operations in RealMatrixImpl,
BigMatrixImpl add, multiply, solve and subtract operations.
This is the first release of Commons Math. Commons Math is a library
of lightweight, self-contained mathematics and statistics components.
The release candidate is being made available so that users can test
the release and provide feedback.