Remove real type

[strtr]

Andrei Alexandrescu Wrote:

> On 04/24/2010 12:52 PM, strtr wrote:
> > Walter Bright Wrote:
> >
> >> strtr wrote:
> >>> Portability will become more important as evo algos get used
> >>> more. Especially in combination with threshold functions. The
> >>> computer will generate/optimize all input/intermediate values
> >>> itself and executing the program on higher precision machines
> >>> might give totally different outputs.
> >>
> >>
> >> You've got a bad algorithm if increasing the precision breaks it.
> >
> > No, I don't. All algorithms using threshold functions which have been
> > generated using evolutionary algorithms will break by changing the
> > precision. That is, you will need to retrain them. The point of most
> > of these algorithms(eg. neural networks) is that you don't know what
> > is happening in it.
> 
> I'm not an expert in GA, but I can tell that a neural network that is 
> dependent on precision is badly broken. 
How can you tell?

> Any NN's transfer function must 
> be smooth.
http://www.doc.ic.ac.uk/~nd/surprise_96/journal/vol4/cs11/report.html#Transfer%20Function

It wasn't for nothing I mentioned threshold functions

Especially in the more complex spiking neural networks bases on dynamical systems, thresholds are kind of important.