Archive for October, 2011

Cognitive Foundry 3.3.1 Released

October 6th, 2011 Comments off

Version 3.3.1 of the Cognitive Foundry is released. Go and download it now. Here is the list of changes:

Release 3.3.1 (2011-10-06):

  * Common Core:
    * Added NumericMap interface, which provides a mapping of keys to numeric
    * Added ScalarMap interface, which extends NumericMap to provide a mapping
      of objects to scalar values represented as doubled.
    * Added AbstractScalarMap and AbstractMutableDoubleMap to provide abstract,
      partial implementations of the ScalarMap interface.
    * Added VectorSpace interface, where a VectorSpace is a type of Ring that
      you can perform Vector-like operations on such as norm, distances, etc.
    * Added AbstractVectorSpace, which provides an abstract, partial
      implementation of the VectorSpace interface.
    * Updated Vector, AbstractVector, VectorEntry to build on new VectorSpace
      interface and AbstractVectorSpace class.
    * Added InfiniteVector interface, which has a potentially infinite number
      of indices, but contains only a countable number in any given instance.
    * Added DefaultInfiniteVector, an implementation of the InfiniteVector
      interface backed by a LinkedHashMap.
    * Rewrote FiniteCapacityBuffer from the ground up, now with backing from a
      fixed-size array to minimize memory allocation.
    * Renamed IntegerCollection to IntegerSpan.
  * Learning Core:
    * Updated ReceiverOperatingCharacteristic to improve calculation
    * Added PriorWeightedNodeLearner interface, which provides for configuring the
      prior weights on the learning algorithm that searches for a decision
      function inside a decision tree.
    * Updated AbstractDecisionTreeNode to fix off by one error in computing node's
    * Updated CategorizationTreeLearner to add ability to specify class priors
      for decision tree algorithm.
    * Updated VectorThresholdInformationGainLearner to add class priors to
      information gain calculation.
    * Updated SequentialMinimalOptimization to improve speed.
    * Added LinearBasisRegression, which uses a basis function to generate
      vectors before performing a LinearRegression.
    * Added MultivariateLinearRegression, which performs multivariate regression;
      does not explicitly estimate a bias term or perform regularization.
    * Added LinearDiscriminantWithBias, which provides a LinearDiscriminant with
      an additional bias term that gets added to the output of the dot product.
    * Updated LinearRegression and LogisticRegression to provide for bias term
      estimation and use of L2 regularization.
    * Renamed SquashedMatrixMultiplyVectorFunction to GeneralizedLinearModel.
    * Renamed DifferentiableSquashedMatrixMultiplyVectorFunction to
    * Renamed MatrixMultiplyVectorFunction to MultivariateDiscriminant.
    * Added MultivariateDiscriminantWithBias, which provides a multivariate
      discriminant with a bias term.
    * Renamed DataHistogram to DataDistribution.
    * Renamed AbstractDataHistogram to AbstractDataDistribution.
    * Added DefaultDataDistribution, a default implementation of the
      DataDistribution interface that uses a backing map.
    * Added LogisticDistribution, an implementation of the scalar logistic
    * Updated MultivariateGaussian to provide for incremental estimation of
      covariance-matrix inverse without a single matrix inversion.
    * Removed DecoupledVectorFunction.
    * Removed DecoupledVectorLinearRegression.
    * Removed PointMassDistribution.
    * Removed MapBasedDataHistogram.
    * Removed MapBasedPointDistribution.
    * Removed MapBasedSortedDataHistogram.
    * Removed AbstractBayseianRegression.
    * Additional general reworking and clean up of distribution code,
      impacting classes in gov.sandia.cognition.statistics.distribution
  * Text Core:
    * Renamed LatentDirichetAllocationVectorGibbsSampler to
      LatentDirichletAllocationVectorGibbsSampler to fix misspelling.
    * Added ParallelLatentDirichletAllocationVectorGibbsSampler, a parallelized
      version of Latent Dirichlet Allocation.

We’ll try to get it up in Maven central soon.

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