getOutputDataType

Get data types of the outputs of a System object

Syntax

[dt_1, dt_2, ..., dt_n] = getOutputDataType(obj)

Description

[dt_1, dt_2, ..., dt_n] = getOutputDataType(obj) returns the data type of each output of the System object™ as a character vector for built-in data types or as a numeric object for fixed-point data types. The number of outputs must match the number of outputs returned by the getNumOutputs method.

Examples

Get the data type of outputs of a System object

Call getOutputDataType to get the data types of the outputs 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 getOutputDataType to get the data types of the outputs.

[dt_1, dt_2] = getOutputDataType(a);

Input Arguments

obj — System object

System object

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

Output Arguments

dt_1, dt_2, ..., dt_n — Data type of output

character vector | numeric type object

Data type of output. For built-in data types, dt is a character vector. For fixed-point data types, dt is a numeric type object.

Version History

Introduced in R2012a