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Lloyd>>>I, also would like to see a presentation using first principles. My
understanding is that Howard will be completing an entry level book
this spring as soon as he completes some obligations this month.
It might be a better book if Howard and Graham were to agree to JOINTLY
write the book. The best and most understandable explanations that have
been given to me have been those from Graham. Graham seems to have an
outstanding ability to describe things in a very understandable way. Here
is his description of SUM from the user manual. Ron D
===========================================================================
Sum adds up the last "n" number of bars. It sums whatever you put into the
first part of the sum formula.
Cum(1) adds 1 to the previous value of Cum, so the first bar is 1 and it
just keeps adding one to the last bar value of cum(1).
You can use Cum to add anything, like how many times you get rising days in
the entire chart:
Rise = C>O; //this gives results of 0 or 1
TotalRise = Cum(Rise);
You could limit this as well to time periods, or any other condition Example
would be one for total rise days since 1995:
RecentRise = C>O and Year()>=1995; //this gives results of 0 or 1
TotalRise = Cum(RecentRise);
If you wanted to know how many rising days in the last 12 bars you would
use:
LastRises = Sum(Rise,12);
===================================================================
----- Original Message -----
From: "Thomas Ludwig" <Thomas.Ludwig@xxxxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Friday, February 08, 2008 1:14 PM
Subject: Re: [amibroker] Re: no amibroker book?
> brian_z111 wrote:
>
>> However, I also agree with the others that we need a good AFL book
>> and IMO Tomasz is the man to write it - yes, even if he has to stop
>> development to do it - take a sabbatical and get out the feathered
>> pen Tomasz
>
> Brian, I agree with Paul and vlanschot that TJ cannot afford to do this.
> And quite frankly - no offense meant, TJ!!! - I'm not sure if he's the
> right guy to do this. I'm afraid he's frequently thinking in quite
> different categories than most of us who are non-programmers and
> apparantly much more simple-minded ;-) He's often made the statement
> that every AB user should read the manual from the first to the last
> page over and over again. Yes, true - but that doesn't really help in
> many situations.
>
> Examples? The description of Exrem and Exremspan - without hints from
> other guys here in the mailing list (who are obviously more intelligent
> than I am) I would never have understood the whole purpose of these
> functions and when to use them.
> Another one: The description of Equity() - my goodness, after all these
> years I still have troubles at times to decide which flag I should use
> and with which consequences.
>
> There are many other examples of functions available in AB that may be
> useful for me in specific situations - but I simply don't understand
> and use them (like Varset). In the past I had very often the
> impression - with a "normal" occupation, a wife and two children who
> sometimes felt neglected - that I'm the wrong target customer for AB
> and TJ. But, well, over the years the moments of desperation have
> become fewer thanks to a lot of pasting of infos from the list here
> (like Graham has mentioned).
>
> Having said this, I think an AFL book is needed written strictly from
> the user's perspective. I think most of us non-programmers and
> non-engineers are in need of "cooking recipes" that organize, structure
> or arrange the vast multitude of possibilities available in AB in
> order to facilitate everyday usage of this excellent application. A
> nice example from the AB library as a starter would be
> http://www.amibroker.com/library/detail.php?id=547
>
> Brian, Herman and you are doing a really marvelous job for the UKB. But
> perhaps some more of such "cooking recipes" should be included. It
> would be great if more AB users could contribute them.
>
> Just my 2 cents ...
>
> Greetings,
>
> Thomas
>
>
>
> 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:
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>
> 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.
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