Re: Calling a method of an object?

[Joanna Rutkowska]

On 10/18/12 21:36, Robert T. Short wrote:
> On 10/18/2012 12:15 PM, Joanna Rutkowska wrote:
> > On 10/18/12 21:00, Hoeltgen Laurent wrote:
> > > 2012/10/18 Joanna Rutkowska <address@hidden
> > > <mailto:address@hidden>>
> > >
> > >     Hello, I've created a simple class:
> > >
> > >     function m = motor (name, Kv, Rm, I0)
> > >     m.name <http://m.name> = name;
> > >              m.Kv = Kv;
> > >              m.Rm = Rm;
> > >              m.I0 = I0;
> > >              m = class (m, "motor");
> > >     end
> > >
> > >     ...and one simple method:
> > >
> > >     function power = power_out (motor, u, i)
> > >              power = (u - i*motor.Rm) * (i - motor.I0);
> > >     end
> > >
> > >     ... and I created an object of the class motor:
> > >
> > >     octave:1> m1 = motor ("Sample motor", 400, 0.05, 1);
> > >
> > >     ... but I cannot call the power_out method using the traditional "OO
> > >     way":
> > >
> > >     octave:2> m1.power_out (1,1);
> > >     error: invalid index for class
> > >
> > >     ... only this form seems to work:
> > >
> > >     octave:2> power_out (m1, 1, 1);
> > >
> > >     Is it how this is supposed to be in Octave? The object.method()
> > >     calling convention is much more intuitive and more readable than
> > >     method(object) IMHO. Also, it clearly allows to avoid name conflicts
> > >     if I got some global function or another method with the same
> > > name...
> > >
> > >     Thanks,
> > >     joanna.
> > >     _________________________________________________
> > >     Help-octave mailing list
> > >     address@hidden <mailto:address@hidden>
> > >     https://mailman.cae.wisc.edu/__listinfo/help-octave
> > >     <https://mailman.cae.wisc.edu/listinfo/help-octave>
> > >
> > >
> > >
> > > Hi,
> > >
> > > according to
> > > http://www.gnu.org/software/octave/doc/interpreter/Creating-a-Class.html#Creating-a-Class,
> > >
> > > all class definitions must be inside folders starting with an @ symbol.
> > > Did you do that?
> > Yes, I did:
> >
> > address@hidden @motor]$ pwd
> > /rw/home/user/multirotor_tools/@motor
> > address@hidden @motor]$ ll
> > total 16
> > -rw-rw-r-- 1 user user 142 Oct 18 18:45 display.m
> > -rw-rw-r-- 1 user user 119 Oct 18 18:51 get.m
> > -rw-rw-r-- 1 user user 181 Oct 18 18:45 motor.m
> > -rw-rw-r-- 1 user user 171 Oct 18 21:14 power_out.m
> >
> > joanna.
> >
> > _______________________________________________
> > Help-octave mailing list
> > address@hidden
> > https://mailman.cae.wisc.edu/listinfo/help-octave
> It may be clunky, but it is MATLAB syntax.  Since octave attempts to be
> MATLAB compatible we are stuck with it.
>
> So you have to use the documented syntax:
>
> m = motor(...)
> p = power(m, ...)

And what happens if there is also a global function with the same name? 
Or another method (of a different class) with the same name?

Thanks,
joanna.