update

Update state of a System object based on inputs

Syntax

update(obj,input1, input2, ..., inputN)

Description

update(obj,input1, input2, ..., inputN) updates the states of a System object™ based on the algorithm specified in the updateImpl method.

example

Examples

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Update the states of a System object

Call update to update the states of a System object.

Consider a System object object defined as,

classdef UnitDelayNondirect < matlab.System
% UnitDelayNondirect Delay input by one time step

properties(DiscreteState)
        State
    end

    methods(Access = protected)
        function resetImpl(obj)
            obj.State = 0; % Initialize states
        end
        function y = outputImpl(obj, ~)
            y = obj.State; % Output current state
 
        end
        function updateImpl(obj,u)
            obj.State = u; % Update state with input
        end
    end
end

Create an instance of the System object and provide it with an input.

a = UnitDelayNondirect();
out = a(1);

Call update to update the states of the System object with new inputs.

update(a,2);

Input Arguments

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`obj` — System object
System object

System object handle used to access properties, states, and methods specific to the object.

`input1, input2, ..., inputN` — Inputs to the System object
inputs

Inputs to the System object. The order of inputs must match the order of inputs defined in the updateImpl method.

Version History

Introduced in R2012a