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Re: [amibroker] String Manipulations



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Hi Ken,

The problem is that you defined H1 as a regular variable and the code  
is looking for a static variable named H1.  Therefore, the static  
variables are empty.  For your test here, just use VarGetText(...
Or make your variables into static variables:
StaticVarSetText("H1", "SPY,500,06/04/2008");
etc.

BR,
Dennis

On Sep 19, 2008, at 4:51 PM, Ken Close wrote:

> Dennis:
>
> I feel I have a lot to learn from dynamic variables here (asked once  
> before), but right now I can not make this concept work.
> Code below is my modifcation of your concept and it does not crash  
> but only prints the commas between the strings.
> List becomes H1 on the first pass through the loop, then, SymList is  
> SymList (empty on first pass) + the first (0) item in H1, or the  
> first symbol. At a minimum, the Symlist will eventually be  
> ",SPY,etc) as there is no logic to skip the first comma---unless I  
> am reading it wrong.  Same issue on each of the other ShrList and  
> DatList.
> So, not sure what I am missing, nor have I been successful in adding  
> anything to correct the problem.
> Any suggestions?
> Many thanks for responding.
> Ken
> ==============================
> My code using your concept"
> H1 = "SPY,500,06/04/2008";
> H2 = "DIA,100,09/02/2008";
> H3 = "QQQQ,300,08/04/2008";
> H4 = "BEARX,1204,05/21/2007";
> TotalSymbolCount = 4;
> SymList = "";
> ShrList = "";
> DatList = "";
> for( i=1; i < totalSymbolCount; i++ )
>     {
>         list = StaticVarGetText( "H" + NumToStr(i, 1.0, 0));
>         SymList = SymList + "," + StrExtract( list , 0);
>         ShrList = ShrList + "," + StrExtract( list, 1);
>         DatList = DatList + "," + StrExtract( list, 2);
>     }
> Title = Symlist + "\n" +
>             ShrList + "\n" +
>             DatList;
>
>
> ===============================
>
> From: amibroker@xxxxxxxxxxxxxxx [mailto:amibroker@xxxxxxxxxxxxxxx]  
> On Behalf Of Dennis Brown
> Sent: Friday, September 19, 2008 1:47 PM
> To: amibroker@xxxxxxxxxxxxxxx
> Subject: Re: [amibroker] String Manipulations
>
> Ken,
>
> This is quite easy by using the StrExtract( list, item) function.  I  
> am doing some similar things in the AFL I am writing for the AFL  
> Glossary project.
>
> Typing this off the top of my head to give you the basic idea:
>
> For( i=1;  i < totalSymbolCount;  i++ )
> {
> list = VarGetText( "H" + NumToStr(i, 1.0, 0);
> SymList = SymList + "," + StrExtract( list , 0);
> ShrList = ShrList + "," + StrExtract( list, 1);
> DatList = DatList + "," + StrExtract( list, 2);
> }
>
> BR,
> Dennis
>
> On Sep 19, 2008, at 12:53 PM, Ken Close wrote:
>
>> I have tried various constructions to achieve the following, but  
>> the code gets complex and has no good way of detecting end of string.
>>
>> I would like to take a series of strings, H1, H2, H3, and create  
>> lists of the elements, as such
>>
>> H1    =    "SPY,500,06/04/2008";
>> H2    =    "DIA,100,09/02/2008";
>> H3    =    "QQQQ,300,08/04/2008";
>>
>> and turn them into these three lists
>>
>> SymList    =    "SPY,DIA,"QQQQ";
>> ShrList    =    "500,100,300";
>> DatList    =    "06/04/2008,09/02/2008,08/04/2008";
>>
>> Hx strings would be hard coded into the overall afl although one  
>> could set up a variety of paramtxt statements to enter them.
>>
>> Seems like it would be somewhat easy (and maybe it is), but I get  
>> bogged down in switch/case statements, or complex if/else statements.
>>
>> Anyone see a more simple way to arrange the strings.
>>
>> My ultimate goal is to have a list of "holdings" and some simple  
>> statistics displayed.
>> AA window with a Watchlist seems obvious--yes?--but I need to have  
>> multiple positions of the same symbol, and I do not think you can  
>> put multiples of the same symbol in a watchlist--same symbol with  
>> different shares purchased on different dates-- (is there a way?).
>>
>> I next tried dynamic variables, in order to manipulate symbols and  
>> their associated price statistics, but that bombed.
>>
>> So now I am attempting to display my list of holdings in a Gfx  
>> title statement.
>> I successfully have it displayed, but using long strings, like  
>> above for the SymList, ShrList, and DatList.  This gets  
>> unmanageable when the number of symbols gets large and you try, by  
>> eye, to coordinate the dates and shares.
>>
>> Thus, I was hoping to list a three element string reprenting each  
>> holding and then rearrage them into long string lists.
>>
>> any ideas?
>>
>> thanks.
>> 
>>

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