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getOutputSize

Get the size of outputs of a System object

    Description

    [sz_1, sz_2, ..., sz_n] = getOutputSize(obj) returns the size of each output of a System object™. The number of outputs must match the number of outputs returned by the getNumOutputs method.

    example

    Examples

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    Call getOutputSize to get the output sizes of a System object.

    Consider a System object object defined as,

    classdef UnitDelay < matlab.System
    % UnitDelayNondirect Delay input by one time step
    
    properties(DiscreteState)
            State
            Step
    end
    
        methods(Access = protected)
            function resetImpl(obj)
                obj.State = 0; % Initialize states
                obj.Step = 1;
            end
           
            function [y1, y2] = stepImpl(obj,u)
                y1 = obj.State; % Output current state
                y2 = obj.Step; 
                
                obj.State = u;
                obj.Step = obj.Step + 1; 
            end
    
            function [sz1, sz2] = getOutputSizeImpl(obj)
                sz1 = [1,1]; % Specify size of output port
                sz2 = [1,1]; 
            end
    
            function [flag1, flag2] = isOutputFixedSizeImpl(obj)
                flag1 = true; % Specify if output is fized size
                flag2 = true;
            end
    
            function [c1, c2] = getOutputDataTypeImpl(obj)
                c1 = 'double'; % Specify output datatype
                c2 = 'double'; 
            end 
    
            function [c1, c2] = isOutputComplexImpl(obj)
                c1 = false;   % Specify if output is complex
                c2 = false; 
            end
        end
    
    end

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

    a = UnitDelay();
    [out, step] = a(1);

    Call getOutputSize to get the output sizes of the System object.

    [sz1, sz2] = getOutputSize(a);

    Input Arguments

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

    Output Arguments

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    Size of outputs of the System object returned as a vector.

    Version History

    Introduced in R2012a