MATLAB Programming Fundamentals - MathWorks

Define System Object Information

This example shows how to define information to display for a System object.

Define System Object Info

You can define your own info method to display specific information for your System

object. The default infoImpl method returns an empty struct. This infoImpl method

returns detailed information when info is called using info(x,'details') or only

count information if it is called using info(x).

methods (Access = protected)

function s = infoImpl(obj,varargin)

if nargin>1 && strcmp('details',varargin(1))

s = struct('Name','Counter',

'Properties', struct('CurrentCount',obj.Count, ...

'Threshold',obj.Threshold));

else

s = struct('Count',obj.Count);

end

end

end

Complete Class Definition File with InfoImpl

classdef Counter < matlab.System

% Counter Count values above a threshold

properties

Threshold = 1

end

properties (DiscreteState)

Count

end

methods (Access = protected)

function setupImpl(obj)

obj.Count = 0;

end

function resetImpl(obj)

obj.Count = 0;

end

34 System object Usage and Authoring