Tomasz, Terry, Thanks.
I think I've got it straight now. Wayne --- In [email protected], "Tomasz Janeczko" <[EMAIL PROTECTED]> wrote: > > Hello, > > > I was under the impression that QuickAFL loads bars depending > > on what is needed to do the calculations in the code > > Your impression was and is correct. But "what is needed to > do calcs" depends on zoom range, functions used, and other factors. > > I explained it in more details on amibroke-beta list 3 years ago: > http://finance.groups.yahoo.com/group/amibroker-beta/message/1123 > > At the same time code can be executed many times in many > different contexts (for example tooltip, commentary, interpretation) and you should make > NO assumptions on how it is calculated. > > Simply always loop from bar ZERO to (BarCount -1 ) bar. > > Now BarIndex() is simply the original number of the bar in the > full data set. > > Again look in the docs: > http://www.amibroker.com/guide/afl/afl_view.php?barindex > > Best regards, > Tomasz Janeczko > amibroker.com > ----- Original Message ----- > From: "wlandry01" <[EMAIL PROTECTED]> > To: <[email protected]> > Sent: Wednesday, January 10, 2007 11:39 PM > Subject: [amibroker] Re: loop counter > > > > Terry, > > > > Your code example illustrates on something that I do not > > understand about QuickAFL. It would seem to me that the line: > > > > x = BarIndex(); > > > > would create an array containing a value for every bar in the > > database and that QuickAFL would, therefore, load all > > array values in order to perform the calculations. As you noted, > > however, BarCount varies depending on the location in the > > chart, so some subset of the entire array is loaded. > > > >, but > > it appears, instead, that what QuickAFL loads depends on the > > location of the selection in the current chart view. > > > > Is that correct? If so, are code statements re-evaluated based on > > the selection location in the chart each time the selection is > > reset? > > > > Thanks, > > > > > > Wayne > > > > > > > > --- In [email protected], "Terry" <MagicTH@> wrote: > >> > >> BarCount does not necessarily == LastValue(BarIndex()) > >> > >> This is because Amibroker uses "quickAFL" which means it only uses > > enough > >> bars to "get the job done". This frequently is not all the bars. > >> > >> -- > >> Terry > >> > >> -----Original Message----- > >> From: [email protected] [mailto:[EMAIL PROTECTED] > > On Behalf > >> Of klaus_korneker > >> Sent: Wednesday, January 10, 2007 09:48 > >> To: [email protected] > >> Subject: [amibroker] Re: loop counter > >> > >> Hi Terry, > >> > >> thank you very much for your explanation ! > >> However it looks a little bit strange. It works still the same. > >> When set the entire array to 0 with Cnt = 0; and click Apply, it shows > >> the same value as with the confirmation code in the graph. However > >> automatically after about 1 second it changes the value to 199 instead > >> 4517 > >> > >> BTW: i know that it displays the number in the title based on my > > cursor. > >> > >> Regards > >> > >> Klaus > >> > >> > >> --- In [email protected], "Terry" <MagicTH@> wrote: > >> > > >> > To initialize the loop you should do this: > >> > Cnt = 0; //Initializes entire array, not just 1st element. > >> > > >> > When you click on the chart the number should change because you are > >> > selecting "that bar". Also see last paragraph about barcount. > > Otherwise, > >> > your loop is correct. > >> > > >> > Here's some code to verify with: > >> > > >> > x = BarIndex(); > >> > Plot(x,"x",1,styleStaircase); > >> > NumToStr(BarCount,1.0); > >> > NumToStr(LastValue(BarIndex()),1.0); > >> > > >> > Note the last two statements print in the interpretation window and > >> they are > >> > different because of quickAFL. The first changes with your selection > >> and the > >> > number of bars showing. The last does not change. It is the absolute > >> number > >> > of bars in your data. This is probably the reason your results are > >> changing > >> > in unexpected ways as you are using BarCount. > >> > -- > >> > Terry > >> > > >> > -----Original Message----- > >> > From: [email protected] [mailto:[EMAIL PROTECTED] > >> On Behalf > >> > Of klaus_korneker > >> > Sent: Wednesday, January 10, 2007 07:43 > >> > To: [email protected] > >> > Subject: [amibroker] loop counter > >> > > >> > Hello, > >> > > >> > i am trying to build a counter with a loop. i have already tried the > >> > following, but it seems that anything is wrong. The chart shows the > >> > bar number, but when i click inside the chart, the number changes. > >> > > >> > Cnt[0] = 0; > >> > for( i = 0; i < BarCount; i++ ) > >> > { > >> > Cnt[ i ] = i ; > >> > } > >> > > >> > Graph0 = Cnt; > >> > > >> > Thanks i advance ! > >> > > >> > > >> > > >> > 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 > >> > > >> > >> > >> > >> > >> 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 > >> > > > > > > > > > > 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 > > > > > > > > > > >
