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From: niklas wernersson on 19 Jan 2010 13:07
I’m writing a program where a have a class representing a system,

classdef classSystem
properties
dataSystem
end
% methods
end

The system contains two subsystems,

classdef classSubSystemA
properties
dataA
end
methods
function funcA()
% do something involving dataA and dataSystem
end
end
end

classdef classSubSystemB
properties
dataB
end
methods
function funcB()
% do some involving dataB and dataSystem
end
end
end

I would like classSystem to contain both classSubSystemA and classSubSystemB. At the same time classSubSystemA and classSubSystemB need to access dataSystem. How do I do this?

(I first tried to use inheritance but then ended up with two systems, classSubSystemA and classSubSystemB, and that is not the way I would like it to be. May it can be done in an other way?)

Greatful for any suggestions on how to organize this.

Best regards, Niklas
From: Matt J on 19 Jan 2010 14:04
"niklas wernersson" <niklas.wernersson(a)gmail.com> wrote in message <hj4sc8$eil$1(a)fred.mathworks.com>...
> I&#8217;m writing a program where a have a class representing a system,
>
> classdef classSystem
> properties
> dataSystem
> end
> % methods
> end
==============

Why not make the 2 subsystems properties of classSystem

classdef classSystem
properties
dataSystem
SubSysA; %of type classSubSystemA
SubSysB; %of type classSubSystemB
end
% methods
end

For SubsSysA/B to access dataSystem you could just pass dataSystem to methods of classSubSystemA/B as required.

Alternatively, you could make dataSystem a handle object and pass this handle to the constructors of classSubSystemA/B when SubsSysA/B are created.
From: niklas wernersson on 20 Jan 2010 02:35
Thanks, I'll try this.

Niklas



"Matt J " <mattjacREMOVE(a)THISieee.spam> wrote in message <hj4vn6$hpa$1(a)fred.mathworks.com>...
> "niklas wernersson" <niklas.wernersson(a)gmail.com> wrote in message <hj4sc8$eil$1(a)fred.mathworks.com>...
> > I&#8217;m writing a program where a have a class representing a system,
> >
> > classdef classSystem
> > properties
> > dataSystem
> > end
> > % methods
> > end
> ==============
>
> Why not make the 2 subsystems properties of classSystem
>
> classdef classSystem
> properties
> dataSystem
> SubSysA; %of type classSubSystemA
> SubSysB; %of type classSubSystemB
> end
> % methods
> end
>
> For SubsSysA/B to access dataSystem you could just pass dataSystem to methods of classSubSystemA/B as required.
>
> Alternatively, you could make dataSystem a handle object and pass this handle to the constructors of classSubSystemA/B when SubsSysA/B are created.
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