getObservationNames - Return DataSet's Observation Names
obsNames = getObservationNames(self) Return a cell array of
an object's observation names; if setObservationNames has not been
called or the 'observationNames' field was not set at construction,
default behavior is to return sprintf('Observation %d',i) for all
observations.
obsNames = getObservationNames(self,indices) Return the observation
names for only the specified indices.
Help for prtDataSetClass/getObservationNames is inherited from superclass prtDataSetBase