Re: Can someone test this for me in MATLAB?

[Michael D. Godfrey]

On 01/04/2013 10:33 AM, Michael Goffioul wrote:
> Can anyone else help here?
>
> I'd also like to know what happens when the class definition file 
> changes due to path change:
> 1) have a class definition in the path; create an object of that 
> class; change path such that the class definition file is not 
> accessible anymore; is the object still valid? is it possible to 
> create more objects of the class?
> 2) a variant of 1) is to have a superclass disappearing from the path, 
> while the subclass is still available
> 3) a variant of 1) is when another class definition with the same name 
> appears in the path: let's say you have 2 different class definitions 
> d1/ClassA.m and d2/ClassA.m (with different methods and/or 
> properties), then "addpath d1; x = ClassA(); rmpath d1; addpath d2; y 
> = ClassA();";
> 4) a variant of 3) is to have a different superclass due to path 
> change, while the subclass stays the same: you have ClassB.m, 
> d1/ClassA.m and d2/ClassA.m, with ClassB inheriting from ClassA; then 
> "addpath d1; x = ClassB(); rmpath d1; addpath d2; y = ClassB();"
> 5) a variant of 4) is without creating objects, simply accessing the 
> metaclass with "?ClassB"
>
> Michael.
I created the file:
[qss:octave_test] more test_class_p.m
classdef ClassC < handle
   properties
     p1 = 0;
     p2 = 1;
   end
end

in the Matlab path and got:
>> ?ClassC

ans =

  0x0 empty meta.class handle
  Package: meta

  Properties:
    Name
    Description
    DetailedDescription
    Hidden
    Sealed
    ConstructOnLoad
    InferiorClasses
    Properties
    Methods
    Events
    SuperClasses
    ContainingPackage


>> y=ClassC()
??? Undefined function or variable 'ClassC'.

>>
Should the definition have been in a @-folder?

I need pretty explicit description of what is needed since I have
not used Matlab Class stuff.

MG