Accord.NET Framework 3.6.0 release notes

09.07.2017.

Version updates and fixes:

• GH-168: Text naive bayes classification gives wrong results;
• GH-207: ResizeBilinear filter can support more pixel formats;
• GH-259: K-means clustering exception;
• GH-318: Adding support for .NET Standard 2.0;
• GH-389: Wilcoxon Signed Rank Test / Mann-Whitney-Wilcoxon Test - differences to R;
• GH-407: Upgrade to NUnit 3;
• GH-470: Multiclass SVM and DTW System.AggregateException;
• GH-499: Add an example for K-means with mixed categorical and continuous data;
• GH-540: Add an example for BaumWelchLearning(TDistribution, TObservation, TOptions) Class;
• GH-549: Multithreaded BagOfVisualWords: "memory corrupt" problem;
• GH-571: Accord.Controls is referencing wrong version of ZedGraph on NuGet;
• GH-602: Robust multivariate regression causes IndexOutOfRangeException;
• GH-605: Renaming AudioCodec.M4A to AudioCodec.MP4ALS;
• GH-604: ColorSlider component resource path's fix;
• GH-606: LowerBoundNewtonRaphson: how to check if converged;
• GH-607: from perezale/aleperez-development;
• GH-611: Framerate issues when transcoding video;
• GH-614: Index out of bounds error in SingularValueDecomposition.Solve;
• GH-619: AugmentedLagrangian hangs on linear problem;
• GH-621: How to calculate the cache size in respect of the available ram;
• GH-624: Add an Example for Chart Class;
• GH-627: Exposing more distribution fields as public properties;
• GH-628: Inject other Random.Generators (like Mersenne Twister);
• GH-630: GeneralizedBetaDistribution.ProbabilityDensityFunction does not have an area of 1;
• GH-631: Adding test case for GoldfarbIdnaniStatus is Success even when Solution violates constraints;
• GH-632: ExponentialDistribution.DistributionFunction return values outside [0,1];
• GH-647: Adding weighted versions of the Euclidean and Square Euclidean distances;
• GH-649: Add an example for NonNegativeLeastSquares Class;
• GH-654: Adding the Distance Transform and Watershed algorithms;
• GH-663: Adding examples for the CsvWriter Class.

• General

  • Adding support for targetting .NET 4.6.2 and NET Standard 2.0;
  • Improving documentation and expanding number of examples.

• Core

  • Moving IParallel and ISupportsCancellation interfaces to Accord.Core.

• IO

  • Adding a parser for the UNIPEN file format used by the pendigits dataset;
  • Whitespace as a candidate delimiter in CSV parser;
  • Adding more overloads to SparseReader's Read method.

• DataSets

  • Renaming the previous Iris dataset to SparseIris since it was a LibSVM dataset;
  • Adding the original Iris, Wine, Pendigits, Chunking and Test Images datasets.

• MachineLearning

  • Updating Learn() methods now throw exceptions when weights are passed to learning algorithms which does not yet support them;
  • Updating CrossValidation, Bootstrap, Split Set Validation and Grid-Search to use the new Learn() API;
  • Adding support for creating decision trees using collection initializers for the attribute/decision variables;
  • Mitigating the impact of a numerical precision issue when normalizing distances to probabilities in the K-Means++ initialization;
  • Fixing issue with K-Means in which the input observations would be changed by the randomization algorithm when using uniform seeding;
  • Correcting the design of the framelet for cluster algorithms so clusterings that are not based on distance proximity to centroids are not forced to implement those methods;
  • Changing the default caching mechanism for Support Vector Machines to keep rows of the kernel matrix instead of individual elements;
  • Adding methods to calculate the cache size given a number of bytes;
  • Adding cache support for Fan Chen Lin's QP (SMO's SecondOrder strategy);
  • Updating IClassifier interface to offer a NumberOfClasses property besides NumberOfOutputs;
  • Updating the base classes for IClassifier such that the Score, Probability and LogLikelihood functions only have to be defined once;
  • Correcting the Score, Probability and LogLikelihood functions of GeneralizedLinearRegression;
  • Updating ITransform and IClassifier's NumberOfInputs, NumberOfOutputs and NumberOfClasses properties to be read-and-write rather than read-only.

• Imaging

  • Adding the Zhang-Suen Thinning Algorithm by Hashem Zawary (thanks!);
  • Adding a FromUrl method to the Image class to download images directly from the web;
  • Adding support for jagged matrices in the ImageToMatrix and MatrixToImage converters;