Define Finite Source Objects - MATLAB & Simulink (original) (raw)

Main Content

This example shows how to define a System object™ that performs a specific number of steps or specific number of reads from a file.

Use the FiniteSource Class and Specify End of the Source

  1. Subclass from finite source class.
    classdef RunTwice < matlab.System & ...
    matlab.system.mixin.FiniteSource
  2. Specify the end of the source with the isDoneImpl method. In this example, the source has two iterations.
    methods (Access = protected)
    function bDone = isDoneImpl(obj)
    bDone = obj.NumSteps==2
    end

Complete Class Definition File with Finite Source

classdef RunTwice < matlab.System & ... matlab.system.mixin.FiniteSource % RunTwice System object that runs exactly two times %
properties (Access = private) NumSteps end

methods (Access = protected) function resetImpl(obj) obj.NumSteps = 0; end

function y = stepImpl(obj)
  if ~obj.isDone()
    obj.NumSteps = obj.NumSteps + 1;
    y = obj.NumSteps;
  else
    y = 0;
  end
end

function bDone = isDoneImpl(obj)
  bDone = obj.NumSteps==2;
end

end end

See Also

matlab.system.mixin.FiniteSource

Topics