Remove real type

[Andrei Alexandrescu]

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. Any NN's transfer function must 
be smooth.

Andrei