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oj! Algorithms v47.3.0 Release Notes

Release Date: 2019-08-08 // over 4 years ago

  • 🔄 Changed

    org.ojalgo

    • The OjAlgoUtils.ENVIRONMENT can now be modified to limit the parallelism of ojAlgo.

    org.ojalgo.algebra

    • ➕ Added a power(int) method to the Operation.Multiplication interface.

    org.ojalgo.array

    • 📦 The package org.ojalgo.array.blas has been renamed org.ojalgo.array.operation
    • 📦 The utility classes Raw1D, Raw2D and RawAnyD have been removed and their contents moved to various classes in the new package org.ojalgo.array.operation
    • 🚚 Everything in org.ojalgo.matrix.store.operation has been moved to org.ojalgo.array.operation

    org.ojalgo.data

    • ➕ Added a variant of the covariances method in DataProcessors that take double[]... as input.

    org.ojalgo.function

    • 🔨 Refactoring in the org.ojalgo.function.multiary package including (api-breaking) name changes to some interfaces and classes. The previous QuadraticFunction has been renamed PureQuadraticFunction, and CompoundFunction renamed QuadraticFunction. Further there is now both a LinearFunction and an AffineFunction.

    org.ojalgo.matrix

    • 🗄 Various deprecations in MatrixStore.LogicalBuilder and the corresponding LogicalBuilder:s of PrimitiveMatrix, ComplexMatrix & RationalMatrix. Everything in the LogicalBuilder:s are now either defined in org.ojalgo.structure.Structure2D.Logical or deprecated.
    • 👉 Tweaked the isSolvable() method implementations of the Cholesky decompositions to return true slightly less often.
    • 🌲 The debug logging of the iterative solvers now output the relative error at each iteration.
    • Implemented the power(int) method defined in Operation.Multiplication.
    • 🆕 New method getCovariance in the SingularValue interface
    • Q1 and Q2 in the SingularValue decomposition have been renamed U and V to match denominations commonly used elsewhere. In Bidiagonal Q1 and Q2 have been renamed LQ and RQ.
    • 🆕 New MatrixStore implementation DiagonalStore to be used for diagonal, bidiagonal and tridiagonal matrices. Replaces two different previous (package private) implementations.
    • MatrixStore.Factory has a new method makeDiagonal(...)
    • MatrixStore.LogicalBuilder has new implementations for the diagonal(), bidiagonal(boolean) and tridiagonal() methods.
    • Some improvements to TransposedStore – more efficient use of the underlying store. Particular in the case when it is a RawStore.
    • 🔨 Some general cleanup/refactoring among the Eigenvalue related code.
    • ➕ Added support for generalised eigenvalue problems.
    • 🛠 Fixed a bug in RawStore - visitRow/Column were interchanged
    • 🚚 Everything in org.ojalgo.matrix.store.operation has been moved to org.ojalgo.array.operation

    org.ojalgo.optimisation

    • Minor rounding/precision related change to how ExpressionsBasedModel receives the solution from the solver and then returns it. The options.solution property is now enforced.
    • 🔨 Internal refactoring of ConvexSolver and its subclasses. This includes changes in behaviour (handling of not-so-convex or otherwise difficult problems).
    • 0️⃣ The IntegerSolver now uses its own ForkJoinPool instance rather than the default commonPool(). The parallelism is derived from OjAlgoUtils.ENVIRONMENT.
    • 🔨 Internal refactoring related to the LinearSolver.Builder as well as the ConvexSolver.Builder.

    org.ojalgo.random

    • SampleSet can now swap in a double[]

    org.ojalgo.scalar

    • Implemented the power(int) method defined in Operation.Multiplication.

    org.ojalgo.structure

    • ➕ Additions to Structure2D.Logical (Moved definitions from MatrixStore.LogicalBuilder to here).
    • 🔨 Refactoring to Factory1D, Factory2D and FactoryAnyD – makeZero(...) is renamed make(...) and everything else is moved to a nested subinterface Dense.