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Hi Tomasz,
be careful with your words ( "you may expect hundreds of upgrades" )-
I know of companies starting like yours and now, after they became
so popular, they merely produce 1 upgrade p.y. for three times the
price of AB ;-) Well, at a certain moment, a product is so good, that
there's not much reason for a fast upgrade cycle, or so bad, that no
one is even interested in an upgrade.
I expect AB to be in the first of those 2 categories :-))
regards
Stefan
BTW : Is this board only about formula's and updates / upgrades for
AB or do some board particpants actually talk about their trading
from time to time ?
--- In amibroker@xxxx, "Tomasz Janeczko" <amibroker@xxxx> wrote:
> Hi,
>
> Thank you very much for your recommendations. Nothing works better
than
> a word from a friend.
> As for my retirement - I don't plan this any time soon. I am 32 now
so you may expect
> hundreds of upgrades :-)
>
> Best regards,
> Tomasz Janeczko
> ===============
> AmiBroker - the comprehensive share manager.
> http://www.amibroker.com
>
> ----- Original Message -----
> From: server not recognized
> To: amibroker@xxxx
> Sent: Tuesday, November 06, 2001 3:30 PM
> Subject: Re: [amibroker] Optimization
>
>
> Tomasz,
>
> Good to see that "Nobody is perfect". My "Fortran 90/95 for
Scientists and Engineers" discusses this on pages 6 to 9. Right after
the pictures that show what a computer looks like.
>
> BTW at last count I have reached twenty recommendations I have
made to others to purchase. Unfortunately, I realise now that if all
AB users were to do this, pretty soon AB would have 100,000
users........and Tomasz would retire to a warm and sunny place.
>
> What to do? Life is full of yin and yang.
> ----- Original Message -----
> From: Tomasz Janeczko
> To: amibroker@xxxx
> Sent: Tuesday, November 06, 2001 11:00 PM
> Subject: Re: [amibroker] Optimization
>
>
> Hello,
>
> The floating point arithmetic is sometime strange :-)
> As you probably know decimal fractions could not be represented
> accuratelly in the IEEE floating point format (only powers of 2
> could be represented so 0.5, 0.25, 0.125, 0.0625 ... are always
precise).
> Unfortuntatelly 0.1 can not be represented 100% accuratelly as
> a power of 2. So it is in fact 0.1000000000000000001 or
something like that.
> Then iterating this leads to 0.800000000000000008 which is
bigger than 0.8
> so it is not included in the loop.
>
> As integers are always represented correctly you may use the
following
> D1= 0.1 * Optimize("D1",5,5,8,1);
>
> Alternativelly you can use this:
> D1=Optimize("D1",0.5,0.5,0.80001,0.1);
>
> Anyway, I will try to implement some improvements to workaround
this problem
> internally in AmiBroker.
>
> Best regards,
> Tomasz Janeczko
> amibroker.com
> ----- Original Message -----
> From: Dimitris Tsokakis
> To: amibroker@xxxx
> Sent: Tuesday, November 06, 2001 9:16 AM
> Subject: [amibroker] Optimization
>
>
> Dear Tomasz,
> I noticed that in
> D1=Optimize("D1",0.5,0.5,0.8,0.1);
> the result list had
> D1=0.5, 0.6, 0.7
> In D1=Optimize("D1",0.5,0.5,0.6,0.01);
> the result was complete
> D1=0.5, 0.51, 0.52, ..., 0.59, 0.60
> Is there any reason for the first case?
> Best Regards
> Dimitris Tsokakis
>
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