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spJointIntervalDistribution

  spJointIntervalDistribution

  Plots the joint frequency distribution of the intervals between 
  successive events as a colored image.

  Example:
  spJointIntervalDistribution(fhandle, InputName1, InputValue1,....)
  spJointIntervalDistribution(fhandle, InputName1, InputValue1,....)
  or
  out=spJointIntervalDistribution(....)

  where
          fhandle is a valid sigTOOL data view handle
          channels is a sigTOOL channel cell array
          out (if requested) will be a sigTOOLResultData object

  If no output is requested the result will be plotted

  Inputs are string/value pairs
      'Sources'               Vector of source channels
      'Start'                 Start time for processing (in seconds)
      'Stop'                  End time for processing (in seconds)
      'BinWidth'              The width of the bins in the result (in
                                seconds)


  A similar analysis can be presented as a scatter plot through the
  spPoincare function

  See also spPoincare

  -------------------------------------------------------------------------
  Author: Malcolm Lidierth 04/08
  Copyright © The Author & King's College London 2008-
  -------------------------------------------------------------------------