Hello, > > Just one last question for personal knowledge, why if ±3.4028235×10^38 is > max/min finite number, -1*10^10 return empty ?
There is no NULL value in IEEE standard. And NULLs are needed in T/A software to mark array items of "undetermined" value (as for first N-elements of MA( C, N ) ) So one has to pick arbitrary NULL value out of allowed floating point values. So -1e10 was choosen arbitrarily. There are reasons why this and not other value but it is too long story. Best regards, Tomasz Janeczko amibroker.com ----- Original Message ----- From: "Tom Tom" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Thursday, November 16, 2006 11:45 PM Subject: [amibroker] Re: Digit precision on AB ? > Thanks for you answer Thomas. > I was missing the fact that it was not 10^e but 2^ e, and i was missing my > eyes too, you are right. > > Just one last question for personal knowledge, why if ±3.4028235×10^38 is > max/min finite number, -1*10^10 return empty ? > > > > Really sorry if i bother the bandwith with this thread, it was really not my > purpose. I was just questionning myself about precision. > > Just for my defence, this is not so esoteric i hope : > I agree totally, it is special case (Polynomial fitting for exemple, or like > on what i am working compute coefficients for autoregressive model) which > need to be traited by script, dll,... > But it doesn't matter how many pixels you got on the chart. If you have many > recursion wich increase rounding error you can see the difference even in > 640*400 (i.e: PolyFit fred posted, if in double precison VBS there was need > to center X axis on zero ! and just changing this translation you can see > diff. on the chart). > I am aware that more precision is more slower, and prefer many times the way > you make Amibroker work... it is so fast ! Thanks Thomas. It is the more > important for trading purpose. > > > Cheers, > Mich. > > _________________________________________________________________ > Retrouvez tout en un clin d'oil avec Windows Desktop Search ! > http://desktop.msn.fr/ > > > > Please note that this group is for discussion between users only. > > To get support from AmiBroker please send an e-mail directly to > SUPPORT {at} amibroker.com > > For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG: > http://www.amibroker.com/devlog/ > > For other support material please check also: > http://www.amibroker.com/support.html > > Yahoo! Groups Links > > > > > >
