prtDataSetClass < prtDataSetStandard & prtDataInterfaceCategoricalTargets
  dataSet = prtDataSetClass generates a prtDataSetClass object
 
      dataSet = prtDataSetClass(X,Y) generates a prtDataSetClass from
      the nObservations x nFeatures double matrix X and the
      nObservations x 1 label vector Y.
 
      dataSet = prtDataSetClass(PROPERTY1, VALUE1, ...) constructs a
      prtDataSetClass object dataSet with properties as specified by
      PROPERTY/VALUE pairs.
 
      A prtDataSetClass object inherits all properties from the
      prtDataSetStandard class. In addition, it has the following properties:
 
      nClasses             - The number of classes
      uniqueClasses        - An array of the integer class labels
      isUnary              - True if the number of classes = 1
      isBinary             - True if the number of classes = 2
      isMary               - True if the number of classes > 2
      isZeroOne            - True if the unique classes are 0 and 1
      nObservationsByClass - The number of observations per class.
 
      A prtDataSetClass inherits all methods from the prtDataSetStandard
      class. In addition, it has the following methods:
 
      getObservationsByClass     - Return the observations per class
      getObservationsByClassInd  - Return the observations by class and index
      getTargetsAsBinaryMatrix   - Return a binary matrix of targets.
      explore                    - Explore the prtDataSetClass object
      plot                       - Plot the data set
      plotFeatureDensity         - Plot the probability density estimate
                                   of a single feature, labeled by class.
      plotStar                   - Create a star plot to visualize higher
                                   dimensional data
      plotAsTimeSeries           - Plot the prtDataSetClass object as a
                                   time series
      plotPairs                  - Plot a grid of plots containing each
                                   set of two-features with density
                                   estimates on the diagonals
      plotDensity                - Plot the density of each feature
                                   independently as a volume
 
      Note: As of Jan 5, 2013 prtDataSetClass enables the use of NAN
      values in the target vector to specify unlabled data.  This data
      and class value (NAN) are treated specially.  e.g., NAN labels do
      not count towards the nClasses and will not appear in
      uniqueClasses.  It is not possible to set the name of
      the class corresponding to NAN.  See
      prtDataInterfaceCategoricalTargets for more information.