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If you've been coding for 30 years you must have bushed up against APL?
(A Programming Language) Things were going so well for IBM in hardware
and software that we were trying to convert customers to using this
language.
In APL every variable was treated as a set(array). These sets had different
shapes/characteristics. Amibroker has that similar aspect to APL, except
you don't to use a special type ball with Greek symbols. For example to get
the
shape of the set (rho Close)....provides the number of elements in that set,
while
+/Close would sum the elements. Calculating an average was +/Close divided
by rho Close
JOE
----- Original Message -----
From: "Homar Simpson" <x77777x@xxxxxxxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Tuesday, December 05, 2006 12:10 AM
Subject: [amibroker] Re: Having a nasty time figuring this APL out.
> As I mentioned I've been programming for 30 years.
>
> What I'm doing here is assigning a SINGLE boolean variable based on
> the comparison of array contents. If I did this in VB or VBA , there
> would be no issue. Are you saying the boolean takes on the
> characteristic of the tested array? I think Tradeestation does
> something like that.
>
> If thats the case , how would you
>
> If I say Var1=x(5)-y(2), then Var1 is not an array.
>
> Explain how:
> if (PassTest==False) i=0;
> generates an array error??
>
>
> Please explain the actual reason, I've read the docs and there's
> nothing there to make this clear.
>
>
> ================================================================
> Days=Param("Days To Test",3,1,15,1);
>
> PassTest=True;
>
> for(i=Days; i>0 ; i--)
>
> {
> TestVolume = IIf((Ref(Volume ,-i+1)> Ref(Volume ,-i)),True,False);
>
> PassTest = IIf(testvolume == False,False,PassTest );
>
>
> if (PassTest==False) i=0;
>
>
> }
>
>
> _TRACE("--------------------------------- ");
>
> FL1=PassTest;
> FL2=Close >Param("ClosingPrice",5,0,999999,1);
>
> Filter = FL1 AND FL2;
>
> AddColumn(Close,"Close",1.4);
> AddColumn(Volume,"Volume",1.0);
> AddTextColumn( FullName(), "Full name", 77);
>
> AddColumn(Ref(Volume,-1),"Volume -1",1.0);
> AddColumn(Ref(Volume,-2),"Volume -2",1.0);
> AddColumn(Ref(Volume,-3),"Volume -3",1.0);
>
>
>
> 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
>
>
>
>
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