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[Anders Logg <logg@xxxxxxxxx>]

On Tue, Feb 17, 2009 at 05:05:16PM +0000, A Navaei wrote:
> 2009/2/17 Anders Logg <logg@xxxxxxxxx>:
> >>   MyFunction f_(f);
> >
> > Here you copy the function f to f_ and since f has a zero vector, f_
> > will also have a zero vector.
> 
> It seems when we create f in python, it doesn't come with a zero
> vector. That's why interpolate.py works.
> 
> >
> >>   f.interpolate(f_.vector(), f.function_space());
> >
> > Here f_ already has a zero vector or would get it by the call to
> > vector() if it didn't so again the result will be zero.
> 
> So the work-around doesn't work in c++ (but for whatever reason it
> works in python). I would call the zero vector problem a bug.

I'd call it a feature.

-- 
Anders

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