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Class Hierarchy Constructor Syntax - Include all inherited properties;

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CustomBuilt
CustomBuilt 2016-9-8
回答： Steven Lord 2016-9-8
I have a class with two parents. I am after a simpler constructor method that encapsulates all the inherited properties, example;
classdef signalEcho < signal & target
properties
deltaT
end
properties (Dependent)
EchoCarrierFrequency
EchoDutyCycle
end
methods
function [thisEcho] = signalEcho(thisSignal, thisTarget, deltaT)
thisEcho = thisEcho@signal(thisSignal.CarrierFrequency, thisSignal.PulseRepFreq, thisSignal.DutyCycle);
thisEcho = thisEcho@target(thisTarget.PositionX, thisTarget.PositionY, thisTarget.Velocity, thisTarget.Heading);
if nargin == 3
thisEcho.deltaT = deltaT;
end
end
Would like to replace the constructor with;
methods
function [thisEcho] = signalEcho(thisSignal, thisTarget, deltaT)
thisEcho = thisEcho@signal(thisSignal);
thisEcho = thisEcho@target(thisTarget);
if nargin == 3
thisEcho.deltaT = deltaT;
end
end
When using the above method no inherited data is populated into the the signalEcho object.

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回答（1 个）

Steven Lord
Steven Lord 2016-9-8
As per the "Initialize Objects Using Multiple Superclasses" section on this documentation page try removing the output argument from your calls to the constructors for the superclasses. So instead of:
thisEcho = thisEcho@signal(thisSignal.CarrierFrequency, thisSignal.PulseRepFreq, thisSignal.DutyCycle);
use:
thisEcho@signal(thisSignal.CarrierFrequency, thisSignal.PulseRepFreq, thisSignal.DutyCycle);

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