I think the sign of the number should be the same in both "short" and "long" expressions.
i.e. C - Ref( C, -1 ) = C - C(-1) In other contexts than AmiBroker, I would suggest having the positive integer refer to the past, as most other softwares do, _however_, that's not the way AB currently does it, and having the sign of the integer mean two different directions in the same program would be a conceptual disaster (IMO). BTW, future-looking _is_ important, and I think it should be supported identically with past-looking. There are lots of historical studies for statistics that are much easier to write with future-looking than without. It is understood that you can't run these in realtime, but that does not alter their historical utility. Personally, I would welcome the availability of the shorter form, as constant use of Ref() is textually cumbersome. --- In [email protected], "Tomasz Janeczko" <gro...@...> wrote: > > Re: [amibroker] A shorter syntax to reference past elements of arrayHerman, > > You are right that it maight be confusing, therefore I was thinking about using this short form only to reference past > (as it is most common scenario, considering the fact that we all the time attempt *not* to look into the future). > > The whole story is just to make common expressions like C - Ref( C, -1 ) shorter, like this: C - C(1) > but I have second thoughts as well, as it truly may create lots of confusion. > > Best regards, > Tomasz Janeczko > amibroker.com > ----- Original Message ----- > From: Herman > To: Tomasz Janeczko > Sent: Thursday, February 19, 2009 5:20 PM > Subject: Re: [amibroker] A shorter syntax to reference past elements of array > > > Sorry , but imo the new forms are critic and counter intuitive. > > > > > C(5) looks back 5 bars.... what would looking forward look like? C(-5)? > > > > > imo, very confusing. I can't help but wonder what made this idea surface :-)) > > > > > herman > > > > > > > > Thursday, February 19, 2009, 11:08:25 AM, you wrote: > > > > > > Hello, > > > > > > As a convenience feature I was contemplating for some time to allow > > > shorter syntax to very common operation of referring to past elements of the array. > > > As you now current syntax to refer to past is: > > > > > > Ref( array, -bars ) > > > > > > So close five bars back is Ref( C, -5 ) > > > > > > I don't have any technical problem with adding new > > > operator that will make it shorter, > > > but I am wondering about the most preferrable "form", > > > that is easy to use and does not create confusion. > > > > > > So I would like to ask you which > > > "short form" would you prefer. > > > - c...@5 > > > - C#5 > > > - C(5) > > > - I don't like the idea at all > > > > > > Please use this poll to vote: > > > http://finance.groups.yahoo.com/group/amibroker/surveys?id=2828485 > > > > > > Thank you. > > > > > > Best regards, > > > Tomasz Janeczko > > > amibroker.com > > > > > > > > > ------------------------------------ > > > > > > **** IMPORTANT PLEASE READ **** > > > This group is for the discussion between users only. > > > This is *NOT* technical support channel. > > > > > > TO GET TECHNICAL SUPPORT send an e-mail directly to > > > SUPPORT {at} amibroker.com > > > > > > TO SUBMIT SUGGESTIONS please use FEEDBACK CENTER at > > > http://www.amibroker.com/feedback/ > > > (submissions sent via other channels won't be considered) > > > > > > For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG: > > > http://www.amibroker.com/devlog/ > > > > > > Yahoo! Groups Links > > > > > > http://groups.yahoo.com/group/amibroker/ > > > > > > Individual Email | Traditional > > > > > > http://groups.yahoo.com/group/amibroker/join > > > (Yahoo! ID required) > > > > > > mailto:[email protected] > > > mailto:[email protected] > > > > > > [email protected] > > > > > > http://docs.yahoo.com/info/terms/ >
