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oj! Algorithms v48.2.0 Release Notes

Release Date: 2020-06-22 // almost 4 years ago

  • ➕ Added

    org.ojalgo.function

    • 🆕 New atan2 approximation that is about 10x faster than the ordinary Math.atan2
    • The lower/upper incomplete Gamma functions

    org.ojalgo.random

    • Implemented the ChiSquare distribution
    • Implemented the T distribution

    org.ojalgo.structure

    • 🆕 New method repeat(int,int) in Structure2D.Logical implemented in MatrixStore.LogicalBuilder and BasicMatrix.LogicalBuilder.

    org.ojalgo.type

    • 🆕 New array builder and (type) converter class named FloatingPointReceptacle.
    • PrimitiveNumber implementations for all primitive number types.
    • 🆕 New classes EntryPair, EntryList, EntrySet and IndexedMap to deal with key-value pairs in various ways.

    🔄 Changed

    org.ojalgo.optimisation

    • 🔄 Changed how the IntegerSolver instantiates its ForkJoinPool; using Java 9's more expressive constructor if it's available.
    • Modifications to the parameter scaling functionality of ExpressionsBasedModel

    🗄 Deprecated

    org.ojalgo.type

    • 📦 Everything, previously existing, in the org.ojalgo.type.keyvalue package has been deprecated. Instead there is a new interface EntryPair, as well as a collection of implementations, that replace it. The functionality of the old and new stuff only partially overlap. There are also matching classes EntryList, EntrySet and others.

    🛠 Fixed

    org.ojalgo.matrix

    • 🛠 Fixed a problem in SparseStore when concurrently adding different elements
    • 🛠 Reviewed and potentially fixed various problems regarding matrix multiplication with more Than Integer.MAX_VALUE elements.

    org.ojalgo.optimisation

    • Fixed a problem where time_abort would be ignored if the solver had found a feasible solution. (In that case it would only check time_suffice.)

    ✂ Removed

    org.ojalgo.structure

    • The all int version of the Structure2D.index(...) method. With larger 2D structures this would overflow.